Internal and external urethral sphincter muscles control micturition. In humans and other mammals, the anatomy of a typical respiratory system is the respiratory tract.The tract is divided into an upper and a lower respiratory tract.The upper tract includes the nose, nasal cavities, sinuses, pharynx and the part of the larynx above the vocal folds.The lower tract (Fig. The outside of the foreskin is a continuation of the skin on the shaft of the penis, but the inner foreskin is a mucous membrane like the inside of the eyelid or the mouth. An anatomic ring is formed by the fused bones of the ilium, ischium and pubis attached to the sacrum. The cranial nerves emerge from the central Cetacea (/ s t e /; from Latin cetus 'whale', from Ancient Greek () 'huge fish, sea monster') is an infraorder of aquatic mammals that includes whales, dolphins, and porpoises.Key characteristics are their fully aquatic lifestyle, streamlined body shape, often large size and exclusively carnivorous diet. It is anatomically homologous to the clitoral glans.The glans penis is part of the male reproductive system in humans and other mammals where it may appear smooth, spiny, Definition. external auditory canal, also called external auditory meatus, or external acoustic meatus, passageway that leads from the outside of the head to the tympanic membrane, or eardrum membrane, of each ear. The maxillary sinuses are innervated by the Like the eyelid, the foreskin is free to move after it separates from the glans, which usually occurs before or during puberty. The inner surface of the concha is covered by a mucous membrane that contains large vascular spaces that can change in size in order to control the width of the nasal cavity. Each maxillary sinus is drained by one or more openings (maxillary ostia) into the middle nasal meatus.Similar to the frontal sinuses, the maxillary sinuses are also drained at the semilunar hiatus.. Mesangial cells are modified smooth muscle cells that lie between the capillaries. Earwax, also known as cerumen, is a yellowish, waxy substance secreted in the ear canals. The temporal bone is ossified from eight centers, exclusive of those for the internal ear and the tympanic ossicles: one for the squama including the zygomatic process, one for the tympanic part, four for the petrous and mastoid parts, and two for the styloid process.Just before the end of prenatal development [Fig. WebMD's Sinuses Anatomy Page provides a detailed image and definition of the sinuses including their function and location. A penis (plural penises or penes (/-n i z /)) is the primary sexual organ that male animals use to inseminate females (or hermaphrodites) during copulation. Such organs occur in many animals, both vertebrate and invertebrate, but males do not bear a penis in every animal species, and in those species in which the male does bear a so-called penis, the penises in the various species The mucocutaneous zone occurs where the outer and inner foreskin meet. Mastoid Process Location. The inferior nasal concha is the longest and broadest of the three conchae.Unlike the superior and middle, the inferior nasal concha is formed by an independent bone (of the same name). The definition of mechanically separated meat (MSM) should be a generic one covering all methods of mechanical separation. The outside of the foreskin is a continuation of the skin on the shaft of the penis, but the inner foreskin is a mucous membrane like the inside of the eyelid or the mouth. The glomerulus is a small tuft of capillaries containing two cell types. Earwax, also known as cerumen, is a yellowish, waxy substance secreted in the ear canals. The biological and physical aspects of sexuality largely concern the human The inner surface of the concha is covered by a mucous membrane that contains large vascular spaces that can change in size in order to control the width of the nasal cavity. In general, vestibule is a small space or cavity at the beginning of a canal. The vulval vestibule is a part of the vulva between the labia minora into which the urinary meatus (urethral A mucous membrane or mucosa is a membrane that lines various cavities in the body of an organism and covers the surface of internal organs. They are situated deep in the bodies of the maxillae. It is composed of central and peripheral portions. It is anatomically homologous to the clitoral glans.The glans penis is part of the male reproductive system in humans and other mammals where it may appear smooth, spiny, External definition, of or relating to the outside or outer part; outer: an external surface. Contents. Vestibular system anatomy The vestibular system is a somatosensory portion of the nervous system that provides us with the awareness of the spatial position of our head and body (proprioception) and self-motion (kinesthesia).). The mucocutaneous zone occurs where the outer and inner foreskin meet. The frontal sinuses are one of the four pairs of paranasal sinuses that are situated behind the brow ridges. Each maxillary sinus is drained by one or more openings (maxillary ostia) into the middle nasal meatus.Similar to the frontal sinuses, the maxillary sinuses are also drained at the semilunar hiatus.. In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. A penis (plural penises or penes (/-n i z /)) is the primary sexual organ that male animals use to inseminate females (or hermaphrodites) during copulation. They are lightweight yet strong and It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue.It is mostly of endodermal origin and is continuous with the skin at body openings such as the eyes, eyelids, ears, inside the nose, inside the mouth, Near the middle of the squamous part of occipital bone is the external occipital protuberance, the highest point of which is referred to as the inion.The inion is the most prominent projection of the protuberance which is located at the posterioinferior (rear lower) part of the human skull.The nuchal ligament and trapezius muscle attach to it.. fat (main component) vessels internal maxillary artery, depending on its course ascending pharyngeal artery, depending on its course; pterygoid venous plexus, in its portion The frontal sinuses are one of the four pairs of paranasal sinuses that are situated behind the brow ridges. Rapid technological developments in this area mean that a flexible definition is appropriate. In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. Sinuses are mucosa-lined airspaces within the bones of the face and skull.Each opens into the anterior part of the corresponding middle nasal meatus of the nose through the frontonasal duct which traverses the anterior part of the labyrinth of the ethmoid. A mucous membrane or mucosa is a membrane that lines various cavities in the body of an organism and covers the surface of internal organs. Because it is a broad term, which has varied with historical contexts over time, it lacks a precise definition. The urethra (from Greek ourthr) is a tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body of both females and males. External definition, of or relating to the outside or outer part; outer: an external surface. Spiral ganglion The spiral ganglion is the sensory ganglion of the cochlear branch of the vestibulocochlear nerve (CN VIII). This involves biological, psychological, physical, erotic, emotional, social, or spiritual feelings and behaviors. The vulval vestibule is a part of the vulva between the labia minora into which the urinary meatus (urethral The peripheral portion of the vestibular system consists of the vestibular labyrinth, vestibular Vestibule or Vestibulum can have the following meanings, each primarily based upon a common origin, from early 17th century French, derived from Latin vestibulum, -i n. "entrance court".. Anatomy. The peripheral portion of the vestibular system consists of the vestibular labyrinth, vestibular The human nose is the most protruding part of the face.It bears the nostrils and is the first organ of the respiratory system.It is also the principal organ in the olfactory system.The shape of the nose is determined by the nasal bones and the nasal cartilages, including the nasal septum which separates the nostrils and divides the nasal cavity into two. 2.) See more. 2.) external auditory canal, also called external auditory meatus, or external acoustic meatus, passageway that leads from the outside of the head to the tympanic membrane, or eardrum membrane, of each ear. The vulval vestibule is a part of the vulva between the labia minora into which the urinary meatus (urethral A pelvic fracture can occur by low-energy mechanism or by high-energy impact. The urethra is a hollow tube positioned between the urinary bladder and urinary meatus which takes urine stored in the bladder out of the body. Endothelial cells, which have large fenestrae, are not covered by diaphragms. The human nose is the most protruding part of the face.It bears the nostrils and is the first organ of the respiratory system.It is also the principal organ in the olfactory system.The shape of the nose is determined by the nasal bones and the nasal cartilages, including the nasal septum which separates the nostrils and divides the nasal cavity into two. The renal corpuscle is composed of two structures, the glomerulus and the Bowman's capsule. The outer layer of connective tissue that surrounds an artery, or vein the tunica externa, is also called the tunica adventitia.. To some degree, its role is complementary to that of the serosa, which also provides a layer of tissue surrounding an organ. A bone is a rigid organ that constitutes part of the skeleton in most vertebrate animals. Such organs occur in many animals, both vertebrate and invertebrate, but males do not bear a penis in every animal species, and in those species in which the male does bear a so-called penis, the penises in the various species It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue.It is mostly of endodermal origin and is continuous with the skin at body openings such as the eyes, eyelids, ears, inside the nose, inside the mouth, In males, the urethra allows for the expulsion of both urine and semen. Cranial nerves are the nerves that emerge directly from the brain (including the brainstem), of which there are conventionally considered twelve pairs.Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck, including the special senses of vision, taste, smell, and hearing.. External acoustic meatus Medically reviewed by the Healthline Medical Network The ear canal, also called the external acoustic meatus, is a passage comprised of bone and skin leading to the eardrum. The mastoid process The mastoid process is a smooth conical projection of bone located at the base of the mastoid area of the temporal bone. Like the eyelid, the foreskin is free to move after it separates from the glans, which usually occurs before or during puberty. A penis (plural penises or penes (/-n i z /)) is the primary sexual organ that male animals use to inseminate females (or hermaphrodites) during copulation. WebMD's Sinuses Anatomy Page provides a detailed image and definition of the sinuses including their function and location. A mucous membrane or mucosa is a membrane that lines various cavities in the body of an organism and covers the surface of internal organs. Other features include the pudendal cleft, pubic hair, sebaceous glands, the vulval vestibule, and the urogenital triangle. Human sexuality is the way people experience and express themselves sexually. This involves biological, psychological, physical, erotic, emotional, social, or spiritual feelings and behaviors. Nasal Cavity Definition. Definition. Cetacea (/ s t e /; from Latin cetus 'whale', from Ancient Greek () 'huge fish, sea monster') is an infraorder of aquatic mammals that includes whales, dolphins, and porpoises.Key characteristics are their fully aquatic lifestyle, streamlined body shape, often large size and exclusively carnivorous diet. In addition it contains the cell bodies for fibers that gather sensory information from the nasal cavity, part of the soft palate, and the sinus cavities, the auricle and the external auditory meatus . The definition of mechanically separated meat (MSM) should be a generic one covering all methods of mechanical separation. Cranial nerves are the nerves that emerge directly from the brain (including the brainstem), of which there are conventionally considered twelve pairs.Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck, including the special senses of vision, taste, smell, and hearing.. Mesangial cells are modified smooth muscle cells that lie between the capillaries. Other features include the pudendal cleft, pubic hair, sebaceous glands, the vulval vestibule, and the urogenital triangle. The cranial nerves emerge from the central External acoustic meatus Medically reviewed by the Healthline Medical Network The ear canal, also called the external acoustic meatus, is a passage comprised of bone and skin leading to the eardrum. An anatomic ring is formed by the fused bones of the ilium, ischium and pubis attached to the sacrum. The stylomastoid foramen is a small, round opening located on the inferolateral aspect of the temporal bone, between the root of the styloid process and the mastoid process.It serves as the external opening of the facial canal of the temporal bone, which transmits the facial nerve and the stylomastoid artery.. In addition it contains the cell bodies for fibers that gather sensory information from the nasal cavity, part of the soft palate, and the sinus cavities, the auricle and the external auditory meatus . It makes up the upper respiratory system along with the paranasal sinuses, oral cavity, pharynx, and larynx [2], In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. This involves biological, psychological, physical, erotic, emotional, social, or spiritual feelings and behaviors. Mastoid Process Location. It plays an important role in the human ear canal, assisting in cleaning and lubrication, and also provides some protection from bacteria, fungi, and insects.Excess or impacted cerumen can press against the eardrum and/or occlude the external auditory canal and impair hearing, causing conductive Nasal Cavity Definition. The mastoid process Definition. The maxillary sinuses are innervated by the