Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays.However, the term "shark" is also used to refer to extinct shark-like members of the As a result, the female will struggle with the male to reduce the detrimental effects. Sexual Intercourse Definition. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays.However, the term "shark" is also used to refer to extinct shark-like members of the the anal fin of the male may be modified into an intromittent organ by means of which internal fertilization takes place. Male plants and animals produce smaller gametes (spermatozoa, sperm) while females produce larger ones (ova, often called egg cells). Electric organs are derived from modified muscle or in some cases nerve tissue, and have evolved at least six times among the elasmobranchs and teleosts. The fish's hyomandibula bone in the hyoid region behind the gills diminished in size and became the stapes of the amphibian ear, an adaptation necessary for hearing on dry land. Unlike most organ systems, the sexes of differentiated species often It is a reproductive, intromittent organ that additionally serves as the urinal duct. the anal fin of the male may be modified into an intromittent organ by means of which internal fertilization takes place. There may also be a range of secondary organs that increase reproductive fitness. Sexual Intercourse Definition. It is absent in many fish families, but found in nine of the 31 euteleostean orders (Percopsiformes, Myctophiformes, Aulopiformes, Stomiiformes, Salmoniformes, Osmeriformes, Characiformes, Siluriformes and Argentiniformes). In some fish, the gonopodium, andropodium, and claspers are intromittent organs (to introduce sperm into the female) developed from modified fins. The male reproductive organ used for sexual intercourse that in the human male and some other mammals is also used for urination; the tubular portion of the male genitalia (excluding the scrotum). The electric organ is an organ that an electric fish uses to create an electric field. The terminal portion of the ejaculatory duct may be sclerotized to form the intromittent organ, the aedeagus. Noun. It is absent in many fish families, but found in nine of the 31 euteleostean orders (Percopsiformes, Myctophiformes, Aulopiformes, Stomiiformes, Salmoniformes, Osmeriformes, Characiformes, Siluriformes and Argentiniformes). Osteichthyes (/ s t i k i. i z /), popularly referred to as the bony fish, is a diverse taxonomic group of fish that have skeletons primarily composed of bone tissue.They can be contrasted with the Chondrichthyes, which have skeletons primarily composed of cartilage.The vast majority of fish are members of Osteichthyes, which is an extremely diverse and They have backbones, from which they derive their name. Termite" derives from the Latin and Late Latin word termes ("woodworm, white ant"), altered by the influence of Latin terere ("to rub, wear, erode") from the earlier word tarmes.A termite nest is also known as a They have backbones, from which they derive their name. The genital papilla is a small, fleshy tube behind the anus in some fishes, from which the sperm or eggs are released; the sex of a fish can often be This concept can be supported by the examples of sexual conflict in the water strider and pygmy fish. The adipose fin is a soft, fleshy fin found on the back behind the dorsal fin and just forward of the caudal fin. the anal fin of the male may be modified into an intromittent organ by means of which internal fertilization takes place. Famous representatives of these orders are The adipose fin is a soft, fleshy fin found on the back behind the dorsal fin and just forward of the caudal fin. Male plants and animals produce smaller gametes (spermatozoa, sperm) while females produce larger ones (ova, often called egg cells). Unlike most organ systems, the sexes of differentiated species often Osteichthyes (/ s t i k i. i z /), popularly referred to as the bony fish, is a diverse taxonomic group of fish that have skeletons primarily composed of bone tissue.They can be contrasted with the Chondrichthyes, which have skeletons primarily composed of cartilage.The vast majority of fish are members of Osteichthyes, which is an extremely diverse and The genital papilla is a small, fleshy tube behind the anus in some fishes, from which the sperm or eggs are released; the sex of a fish can often be Fish physiology is the scientific study of how the component parts of fish function together in the living fish. Etymology. 0. Organisms that produce both types of gametes are called hermaphrodites. Etymology. A very fine freshwater fish is the Murray cod, which sometimes weighs Too lb; and the golden perch, found in the same river, has rare beauty of colour. It is a biological process in which the fusion of the sperm and the egg occurs inside the female organisms body. The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction.Many non-living substances such as fluids, hormones, and pheromones are also important accessories to the reproductive system. This concept can be supported by the examples of sexual conflict in the water strider and pygmy fish. Organisms that produce both types of gametes are called hermaphrodites. Sexual intercourse, or copulation, is the deposition of sperm into a female via a male intromittent organ.In humans, the intromittent organ is the penis, and sperm are deposited into the vagina, where they make their way to towards the uterus to fertilize an egg. vertebrate, also called Craniata, any animal of the subphylum Vertebrata, the predominant subphylum of the phylum Chordata. Termite" derives from the Latin and Late Latin word termes ("woodworm, white ant"), altered by the influence of Latin terere ("to rub, wear, erode") from the earlier word tarmes.A termite nest is also known as a Fish reproductive organs include testes and ovaries.In most species, gonads are paired organs of similar size, which can be partially or totally fused. Famous representatives of these orders are Sex is the trait that determines whether a sexually reproducing animal or plant produces male gametes or female ones. Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Male water striders exhibit forced copulation on the female. Fish physiology is the scientific study of how the component parts of fish function together in the living fish. The Anatidae are the biological family of water birds that includes ducks, geese, and swans.The family has a cosmopolitan distribution, occurring on all the world's continents except Antarctica.These birds are adapted for swimming, floating on the water surface, and in some cases diving in at least shallow water.The family contains around 174 species in 43 genera. During sexual reproduction, male and Sex is the trait that determines whether a sexually reproducing animal or plant produces male gametes or female ones. Fish reproductive organs include testes and ovaries.In most species, gonads are paired organs of similar size, which can be partially or totally fused. Termite" derives from the Latin and Late Latin word termes ("woodworm, white ant"), altered by the influence of Latin terere ("to rub, wear, erode") from the earlier word tarmes.A termite nest is also known as a The infraorder name Isoptera is derived from the Greek words iso (equal) and ptera (winged), which refers to the nearly equal size of the fore and hind wings. " The female clitoris is homologous to the male penis. This concept can be supported by the examples of sexual conflict in the water strider and pygmy fish. The vertebrates are also characterized by a muscular system consisting primarily of bilaterally paired masses and a central nervous system partly enclosed within the backbone. The infraorder name Isoptera is derived from the Greek words iso (equal) and ptera (winged), which refers to the nearly equal size of the fore and hind wings. " The terminal portion of the ejaculatory duct may be sclerotized to form the intromittent organ, the aedeagus. The Anatidae are the biological family of water birds that includes ducks, geese, and swans.The family has a cosmopolitan distribution, occurring on all the world's continents except Antarctica.These birds are adapted for swimming, floating on the water surface, and in some cases diving in at least shallow water.The family contains around 174 species in 43 genera. The remainder of the male reproductive system is derived from embryonic mesoderm, except for the germ cells, or spermatogonia, the eating of insects is taboo in cultures that have other protein sources such as fish or livestock. In some fish, the gonopodium, andropodium, and claspers are intromittent organs (to introduce sperm into the female) developed from modified fins. It is a reproductive, intromittent organ that additionally serves as the urinal duct. Another standard type is known as Internal fertilization. Electric organs are derived from modified muscle or in some cases nerve tissue, and have evolved at least six times among the elasmobranchs and teleosts. It is a biological process in which the fusion of the sperm and the egg occurs inside the female organisms body. Unlike most organ systems, the sexes of differentiated species often As a result, the female will struggle with the male to reduce the detrimental effects. A very fine freshwater fish is the Murray cod, which sometimes weighs Too lb; and the golden perch, found in the same river, has rare beauty of colour. As a result, the female will struggle with the male to reduce the detrimental effects. Sex is the trait that determines whether a sexually reproducing animal or plant produces male gametes or female ones. The remainder of the male reproductive system is derived from embryonic mesoderm, except for the germ cells, or spermatogonia, the eating of insects is taboo in cultures that have other protein sources such as fish or livestock. Since 1995 the Devil's Hole Pupfish has been in a nearly steady decline, where it was close to extinction at 3568 fish in 2013. The terminal portion of the ejaculatory duct may be sclerotized to form the intromittent organ, the aedeagus. The infraorder name Isoptera is derived from the Greek words iso (equal) and ptera (winged), which refers to the nearly equal size of the fore and hind wings. " Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays.However, the term "shark" is also used to refer to extinct shark-like members of the It is a biological process in which the fusion of the sperm and the egg occurs inside the female organisms body. They have backbones, from which they derive their name. The genital papilla is a small, fleshy tube behind the anus in some fishes, from which the sperm or eggs are released; the sex of a fish can often be The vertebrates are also characterized by a muscular system consisting primarily of bilaterally paired masses and a central nervous system partly enclosed within the backbone. Famous representatives of these orders are The The 0. Fish physiology is the scientific study of how the component parts of fish function together in the living fish. The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction.Many non-living substances such as fluids, hormones, and pheromones are also important accessories to the reproductive system. A pair of intromittent organs of male squamates (snakes, lizards and worm lizards). The word amphibian is derived from the Ancient Greek term (amphbios), which means 'both kinds of life', meaning 'of both kinds' and meaning 'life'. Another standard type is known as Internal fertilization. The male reproductive organ used for sexual intercourse that in the human male and some other mammals is also used for urination; the tubular portion of the male genitalia (excluding the scrotum). It is a reproductive, intromittent organ that additionally serves as the urinal duct. The male reproductive organ used for sexual intercourse that in the human male and some other mammals is also used for urination; the tubular portion of the male genitalia (excluding the scrotum). Noun. During sexual reproduction, male and Los telesteos (Teleostei) son una infraclase de peces seos actinopterigios que incluye el 96 % de todas las especies de peces existentes.Se han descrito ms de 26 000 especies, organizadas en unos 40 rdenes y unas 450 familias.Su tamao va desde el pez remo gigante (Regalecus glesne), que puede medir ms de siete metros, o el pez luna (Mola mola), que puede alcanzar In some fish, the gonopodium, andropodium, and claspers are intromittent organs (to introduce sperm into the female) developed from modified fins. vertebrate, also called Craniata, any animal of the subphylum Vertebrata, the predominant subphylum of the phylum Chordata. Etymology. For this to happen, the male sperm has to be introduced into the female bodys reproductive tract through an intromittent organ. 0. The remainder of the male reproductive system is derived from embryonic mesoderm, except for the germ cells, or spermatogonia, the eating of insects is taboo in cultures that have other protein sources such as fish or livestock. Electric organs are derived from modified muscle or in some cases nerve tissue, and have evolved at least six times among the elasmobranchs and teleosts. The Anatidae are the biological family of water birds that includes ducks, geese, and swans.The family has a cosmopolitan distribution, occurring on all the world's continents except Antarctica.These birds are adapted for swimming, floating on the water surface, and in some cases diving in at least shallow water.The family contains around 174 species in 43 genera. Another standard type is known as Internal fertilization. Organisms that produce both types of gametes are called hermaphrodites. For this to happen, the male sperm has to be introduced into the female bodys reproductive tract through an intromittent organ. The female clitoris is homologous to the male penis. For this to happen, the male sperm has to be introduced into the female bodys reproductive tract through an intromittent organ.