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Sigma KEE - BodyCavity
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BodyCavity
Any BodyPart which contains an unfilled space, e.g. BodyVessels, the atria and ventricles of the heart, the lungs, etc.
Relationships      
Parents 体の部分 A collection of Cells and Tissues which are localized to a specific area of an Organism and which are not pathological. The instances of this Class range from gross structures to small components of complex Organs.
Children AuditoryCanalThe ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. The adult human ear canal extends from the pinna to the eardrum and is about 2.5 centimetres (1 in) in length and 0.7 centimetres (0.3 in) in diameter.[from Wikipedia]
 身体血管Any tube-like structure which occurs naturally in an Organism and through which a BodySubstance can circulate.
 EustachianTubeIn anatomy, the Eustachian tube, also called the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear, of which it is also a part. In adult humans, the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. In humans and other tetrapods, both the middle ear and the ear canal are normally filled with air. Unlike the air of the ear canal, however, the air of the middle ear is not in direct contact with the atmosphere outside the body; thus, a pressure difference can develop between the atmospheric pressure of the ear canal and the middle ear. Normally, the Eustachian tube is collapsed, but it gapes open with swallowing and with positive pressure, allowing the middle ear's pressure to adjust to the atmospheric pressure. The Eustachian tube extends from the anterior wall of the middle ear to the lateral wall of the nasopharynx, approximately at the level of the inferior nasal concha. It consists of a bony part and a cartilaginous part. [from Wikipedia]
 InnerEarThe inner ear is the innermost part of the vertebrate ear. In vertebrates, the inner ear is mainly responsible for sound detection and balance. In Mammals, it consists of the bony labyrinth, a hollow cavity in the TemporalBone of the skull with a system of passages comprising two main functional parts: (1) The cochlea, dedicated to hearing; converting sound pressure patterns from the AuditoryCanal into electrochemical impulses which are passed on to the Brain via the auditory nerve. (2) The vestibular system, dedicated to balance. The inner ear is found in all Vertebrates, with substantial variations in form and function. The inner ear is innervated by the eighth cranial nerve in all vertebrates. [from Wikipedia]
 LeftAtriumOne of the four chambers of the Heart in Primates.
 LeftVentricleOne of the four chambers of the Heart in Primates.
 NasalCavityThe nasal cavity is a large, air-filled space above and behind the nose in the middle of the face. The nasal septum divides the cavity into two cavities, also known as fossae. Each cavity is the continuation of one of the two nostrils. The nasal cavity is the uppermost part of the respiratory system and provides the nasal passage for inhaled air from the nostrils to the nasopharynx and rest of the respiratory tract.[from Wikipedia]
 RightAtriumOne of the four chambers of the Heart in Primates.
 RightVentricleOne of the four chambers of the Heart in Primates.
 TympanicCavityThe tympanic cavity is a small BodyCavity surrounding the bones of the middle ear. Within it sit the ossicles (InnerEarBone), three small Bones that transmit vibrations used in the detection of sound. On its lateral surface, it abuts the external auditory meatus [ AuditoryCanal ] from which it is separated by the tympanic membrane (eardrum).[from Wikipedia]
 UrethraThe urethra is a tube that connects the urinary ladder to the urinary meatus for the removal of Urine from the body of both females and males. In human females and other Primates, the urethra connects to the urinary meatus above the Vagina, whereas in Marsupials, the female's urethra empties into the urogenital sinus. Females use their urethra only for Urination, but males use their urethra for both urination and ejaculation. The external urethral sphincter is a striated muscle that allows voluntary control over urination. The internal sphincter, formed by the involuntary smooth Muscles lining the bladder neck and urethra, receives its Nerve supply by the sympathetic division of the autonomic nervous system. The internal sphincter is present both in males and females. [from Wikipedia]


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