The age of American paddlefish is best The front half of the pouch contains the female gonopore, spermathecal pores, and collateral glands. The cirrus or penis, seminal vesicle and prostatic glands are surrounded in a common cirrus sheath or cirrus sac. The front half of the pouch contains the female gonopore, spermathecal pores, and collateral glands. The ink gland and its associated ink sac empties into the rectum close to the anus, allowing the squid to rapidly discharge black ink into the mantle cavity and surrounding water. All species lay eggs . The name urchin is an old word for hedgehog, which sea urchins resemble; they have archaically been called sea Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes.Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction.The reproductive organs together constitute the reproductive system.In animals, the testis in the male, and the ovary in the female, are called the primary sex organs. A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction.The reproductive organs together constitute the reproductive system.In animals, the testis in the male, and the ovary in the female, are called the primary sex organs. Rotifers have bilateral symmetry and a variety of different shapes. The anatomy of spiders includes many characteristics shared with other arachnids.These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed.. Spiders also have several adaptations that distinguish them from Although diverse, insects are quite similar in overall design, internally and externally. Rotifers have bilateral symmetry and a variety of different shapes. The insect is made up of three main body regions (tagmata), the head, thorax and abdomen. Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia.These filter-feeding organisms are known chiefly from fossils found from the Middle Cambrian (Miaolingian, Wuliuan) through the Lower Carboniferous (Mississippian). Primarily nocturnal, scorpions often Both male and female cockroaches have ten segments in their abdomen. The cirrus or penis, seminal vesicle and prostatic glands are surrounded in a common cirrus sheath or cirrus sac. Order 5. The next four somites, 3 to 6, all bear pairs of spiracles. [pages needed] All others are called secondary sex organs, divided between the external sex organsthe The female has an elongated ovary above the point where the intestine caeca rejoin, from the ovary an oviduct passes in front. The cirrus can be everted through the gonopore during copulation. Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia.These filter-feeding organisms are known chiefly from fossils found from the Middle Cambrian (Miaolingian, Wuliuan) through the Lower Carboniferous (Mississippian). The insect is made up of three main body regions (tagmata), the head, thorax and abdomen. Examples: Sea hares, Aplysia, Petalifera, Notarchus, Bursatella, Akera. The ventral side of somite 1 has a pair of genital opercula covering the gonopore. American paddlefish are among the largest and longest-lived freshwater fishes in North America. Notaspidea: (i) Shell may or may not be present. The front half of the pouch contains the female gonopore, spermathecal pores, and collateral glands. The 7th sternum is boat-shaped in females, and it forms a brood or genital pouch with the 8th and 9th sterna. While many of the species in the group share a number of morphological characteristics, such as a flattened body and being small in size, Monogeneans are divided into two major groups which include monopisthocotyleans, (ii) Mantle present but without mantle cavity. The male has four testes; a short vas deferens arises from the testes and joins a seminal vesicle which enters a penis, the opens by a gonopore below the acetabulum. (v) The male gonopore is situated at the base of the right rhinophore. They have a rigid, usually spherical body bearing moveable spines, which gives the class the name Echinoidea (from the Greek ekhinos 'spine'). (iv) Gill and osphradium on the right side of the body. The timing of the origin of ticks is uncertain, though the Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes.Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". Insect morphology is the study and description of the physical form of insects.The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. All planaria are hermaphrodites, meaning individual animals have both female and male reproductive parts at the same time. An octopus (PL: octopuses,octopi, or octopodes, see below for variants) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ k t p d /, ok-TOP--d).The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a They have a gonopore on the ventral cephalothorax, and the copulation is direct as male Opiliones have a penis, unlike other arachnids. The ink gland and its associated ink sac empties into the rectum close to the anus, allowing the squid to rapidly discharge black ink into the mantle cavity and surrounding water. The age of American paddlefish is best The ventral side of somite 1 has a pair of genital opercula covering the gonopore. Photo source: wiki The body of a rotifer is divided into a head, trunk, and foot, and is typically somewhat cylindrical. Sternite 2 forms the basal plate bearing the pectines, which function as sensory organs. Graptolites are a group of colonial animals, members of the subclass Graptolithina within the class Pterobranchia.These filter-feeding organisms are known chiefly from fossils found from the Middle Cambrian (Miaolingian, Wuliuan) through the Lower Carboniferous (Mississippian). They have a rigid, usually spherical body bearing moveable spines, which gives the class the name Echinoidea (from the Greek ekhinos 'spine'). A sex organ (or reproductive organ) is any part of an animal or plant that is involved in sexual reproduction.The reproductive organs together constitute the reproductive system.In animals, the testis in the male, and the ovary in the female, are called the primary sex organs. The ink is a suspension of melanin particles and quickly disperses to form a dark cloud that They have a shark-like body, average 1.5 m (4.9 ft) in length, weigh 27 kg (60 lb), and can live in excess of thirty years. Although scorpions are most common and diverse in deserts, they also live in many other habitats. (ii) Mantle present but without mantle cavity. Urchins typically range in size from 3 to 10 cm (1 to 4 in), although the largest species can reach up to 36 cm (14 in). Insect physiology includes the physiology and biochemistry of insect organ systems.. The head comprises six fused segments with compound eyes, ocelli, antennae and mouthparts, which differ according Insect morphology is the study and description of the physical form of insects.The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. Primarily nocturnal, scorpions often (iii) Gill bipectinate type. Squid distract attacking predators by ejecting a cloud of ink, giving themselves an opportunity to escape. Insect physiology includes the physiology and biochemistry of insect organ systems.. They have a rigid, usually spherical body bearing moveable spines, which gives the class the name Echinoidea (from the Greek ekhinos 'spine'). Ticks are external parasites, living by feeding on the blood of mammals, birds, and sometimes reptiles and amphibians. The sperm is sometimes packaged in spermatophores and is released through male gonopores that open, often temporarily, on the underside of the animal, roughly two-thirds of the way along the body. Notaspidea: (i) Shell may or may not be present. For most populations the median age is five to eight years and the maximum age is fourteen to eighteen years. The male has four testes; a short vas deferens arises from the testes and joins a seminal vesicle which enters a penis, the opens by a gonopore below the acetabulum. Both parts share a single opening called gonopore, which is located on the ventral side of the posterior half of the body. The cirrus can be everted through the gonopore during copulation. Both parts share a single opening called gonopore, which is located on the ventral side of the posterior half of the body. (iv) Gill and osphradium on the right side of the body. Notaspidea: (i) Shell may or may not be present. The genital atrium is a common chamber for male and female genital apertures, it opens externally by a gonopore lying ventrally in front of the acetabulum. Rotifers have bilateral symmetry and a variety of different shapes. [pages needed] All others are called secondary sex organs, divided between the external sex organsthe All species lay eggs . Both male and female cockroaches have ten segments in their abdomen. The next four somites, 3 to 6, all bear pairs of spiracles. The name urchin is an old word for hedgehog, which sea urchins resemble; they have archaically been called sea They have a shark-like body, average 1.5 m (4.9 ft) in length, weigh 27 kg (60 lb), and can live in excess of thirty years. The body of a rotifer is divided into a head, trunk, and foot, and is typically somewhat cylindrical. Sternite 2 forms the basal plate bearing the pectines, which function as sensory organs. Three physical features separate insects from other arthropods: they have a body divided into three regions (called tagmata) (head, thorax, and abdomen), have three pairs : Opiliones 6,600 4 Three physical features separate insects from other arthropods: they have a body divided into three regions (called tagmata) (head, thorax, and abdomen), have three pairs The ink is a suspension of melanin particles and quickly disperses to form a dark cloud that Typical body length does not exceed 7 mm (0.28 in), and some species are smaller than 1 mm, although the largest known species, Trogulus torosus ( Trogulidae ), grows as long as 22 mm (0. Both male and female cockroaches have ten segments in their abdomen. All planaria are hermaphrodites, meaning individual animals have both female and male reproductive parts at the same time. Primarily nocturnal, scorpions often : Opiliones 6,600 4 The genital atrium is a common chamber for male and female genital apertures, it opens externally by a gonopore lying ventrally in front of the acetabulum. (ii) Mantle present but without mantle cavity. A possible early graptolite, Chaunograptus, is known from the Middle Cambrian. [In this image] Planarian reproductive system. The cirrus can be everted through the gonopore during copulation. Order 5. The female has an elongated ovary above the point where the intestine caeca rejoin, from the ovary an oviduct passes in front. A possible early graptolite, Chaunograptus, is known from the Middle Cambrian. Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes.Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". Urchins typically range in size from 3 to 10 cm (1 to 4 in), although the largest species can reach up to 36 cm (14 in). The next four somites, 3 to 6, all bear pairs of spiracles. (iv) Gill and osphradium on the right side of the body. The 7th sternum is boat-shaped in females, and it forms a brood or genital pouch with the 8th and 9th sterna. Three physical features separate insects from other arthropods: they have a body divided into three regions (called tagmata) (head, thorax, and abdomen), have three pairs For most populations the median age is five to eight years and the maximum age is fourteen to eighteen years. Typical body length does not exceed 7 mm (0.28 in), and some species are smaller than 1 mm, although the largest known species, Trogulus torosus ( Trogulidae ), grows as long as 22 mm (0. They have a shark-like body, average 1.5 m (4.9 ft) in length, weigh 27 kg (60 lb), and can live in excess of thirty years. An octopus (PL: octopuses,octopi, or octopodes, see below for variants) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ k t p d /, ok-TOP--d).The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a While many of the species in the group share a number of morphological characteristics, such as a flattened body and being small in size, Monogeneans are divided into two major groups which include monopisthocotyleans, The body of a rotifer is divided into a head, trunk, and foot, and is typically somewhat cylindrical. The head comprises six fused segments with compound eyes, ocelli, antennae and mouthparts, which differ according (v) The male gonopore is situated at the base of the right rhinophore. They have a gonopore on the ventral cephalothorax, and the copulation is direct as male Opiliones have a penis, unlike other arachnids. There is a well-developed cuticle, which may be thick and rigid, giving the animal a box-like shape, or flexible, giving the animal a worm-like shape; such rotifers are respectively called loricate and illoricate. The name urchin is an old word for hedgehog, which sea urchins resemble; they have archaically been called sea The cirrus or penis, seminal vesicle and prostatic glands are surrounded in a common cirrus sheath or cirrus sac. The ink is a suspension of melanin particles and quickly disperses to form a dark cloud that The female has an elongated ovary above the point where the intestine caeca rejoin, from the ovary an oviduct passes in front. The head comprises six fused segments with compound eyes, ocelli, antennae and mouthparts, which differ according Squid distract attacking predators by ejecting a cloud of ink, giving themselves an opportunity to escape. The ink gland and its associated ink sac empties into the rectum close to the anus, allowing the squid to rapidly discharge black ink into the mantle cavity and surrounding water. : Opiliones 6,600 4 Ticks are external parasites, living by feeding on the blood of mammals, birds, and sometimes reptiles and amphibians. Examples: The insect is made up of three main body regions (tagmata), the head, thorax and abdomen. The sperm is sometimes packaged in spermatophores and is released through male gonopores that open, often temporarily, on the underside of the animal, roughly two-thirds of the way along the body. According to studies, Monogenea is one of the oldest groups in the phylum Platyhelminthes having evolved from Turbellarians over 100 million years ago.. American paddlefish are among the largest and longest-lived freshwater fishes in North America. Although diverse, insects are quite similar in overall design, internally and externally. The timing of the origin of ticks is uncertain, though the Photo source: wiki Although scorpions are most common and diverse in deserts, they also live in many other habitats. The 7th sternum is boat-shaped in females, and it forms a brood or genital pouch with the 8th and 9th sterna. The timing of the origin of ticks is uncertain, though the scorpion, (order Scorpiones or Scorpionida), any of approximately 1,500 elongated arachnid species characterized by a segmented curved tail tipped with a venomous stinger at the rear of the body and a pair of grasping pincers at the front. They have a gonopore on the ventral cephalothorax, and the copulation is direct as male Opiliones have a penis, unlike other arachnids. They serve as openings for the scorpion's respiratory organs, known as book lungs. : Solifugae 1,100 Examples: They serve as openings for the scorpion's respiratory organs, known as book lungs. Examples: Sea hares, Aplysia, Petalifera, Notarchus, Bursatella, Akera. While many of the species in the group share a number of morphological characteristics, such as a flattened body and being small in size, Monogeneans are divided into two major groups which include monopisthocotyleans, There is a well-developed cuticle, which may be thick and rigid, giving the animal a box-like shape, or flexible, giving the animal a worm-like shape; such rotifers are respectively called loricate and illoricate. [In this image] Planarian reproductive system. The anatomy of spiders includes many characteristics shared with other arachnids.These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed.. Spiders also have several adaptations that distinguish them from The age of American paddlefish is best An octopus (PL: octopuses,octopi, or octopodes, see below for variants) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ k t p d /, ok-TOP--d).The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a The ventral side of somite 1 has a pair of genital opercula covering the gonopore. All planaria are hermaphrodites, meaning individual animals have both female and male reproductive parts at the same time. Urchins typically range in size from 3 to 10 cm (1 to 4 in), although the largest species can reach up to 36 cm (14 in). For most populations the median age is five to eight years and the maximum age is fourteen to eighteen years. [pages needed] All others are called secondary sex organs, divided between the external sex organsthe Although scorpions are most common and diverse in deserts, they also live in many other habitats. Typical body length does not exceed 7 mm (0.28 in), and some species are smaller than 1 mm, although the largest known species, Trogulus torosus ( Trogulidae ), grows as long as 22 mm (0. A copulatory organ on the tail collects the sperm and transfers it to the partner's seminal receptacle through the female gonopore. A copulatory organ on the tail collects the sperm and transfers it to the partner's seminal receptacle through the female gonopore. Both parts share a single opening called gonopore, which is located on the ventral side of the posterior half of the body. According to studies, Monogenea is one of the oldest groups in the phylum Platyhelminthes having evolved from Turbellarians over 100 million years ago.. scorpion, (order Scorpiones or Scorpionida), any of approximately 1,500 elongated arachnid species characterized by a segmented curved tail tipped with a venomous stinger at the rear of the body and a pair of grasping pincers at the front. American paddlefish are among the largest and longest-lived freshwater fishes in North America. Insect physiology includes the physiology and biochemistry of insect organ systems.. [In this image] Planarian reproductive system. (v) The male gonopore is situated at the base of the right rhinophore. scorpion, (order Scorpiones or Scorpionida), any of approximately 1,500 elongated arachnid species characterized by a segmented curved tail tipped with a venomous stinger at the rear of the body and a pair of grasping pincers at the front. Although diverse, insects are quite similar in overall design, internally and externally. The anatomy of spiders includes many characteristics shared with other arachnids.These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed.. Spiders also have several adaptations that distinguish them from Order 5. According to studies, Monogenea is one of the oldest groups in the phylum Platyhelminthes having evolved from Turbellarians over 100 million years ago.. A copulatory organ on the tail collects the sperm and transfers it to the partner's seminal receptacle through the female gonopore. The male has four testes; a short vas deferens arises from the testes and joins a seminal vesicle which enters a penis, the opens by a gonopore below the acetabulum. All species lay eggs . A possible early graptolite, Chaunograptus, is known from the Middle Cambrian. Examples: Squid distract attacking predators by ejecting a cloud of ink, giving themselves an opportunity to escape. The genital atrium is a common chamber for male and female genital apertures, it opens externally by a gonopore lying ventrally in front of the acetabulum. Ticks are external parasites, living by feeding on the blood of mammals, birds, and sometimes reptiles and amphibians. They serve as openings for the scorpion's respiratory organs, known as book lungs. : Solifugae 1,100 Photo source: wiki (iii) Gill bipectinate type. There is a well-developed cuticle, which may be thick and rigid, giving the animal a box-like shape, or flexible, giving the animal a worm-like shape; such rotifers are respectively called loricate and illoricate. (iii) Gill bipectinate type. : Solifugae 1,100 Insect morphology is the study and description of the physical form of insects.The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history. The sperm is sometimes packaged in spermatophores and is released through male gonopores that open, often temporarily, on the underside of the animal, roughly two-thirds of the way along the body. Examples: Sea hares, Aplysia, Petalifera, Notarchus, Bursatella, Akera. Sternite 2 forms the basal plate bearing the pectines, which function as sensory organs.