| white matter | White matter is one of the two components of the central nervous system and consists mostly of glial cells and myelinated axons that transmit signals from one region of the cerebrum to another and between the cerebrum and lower brain centers. White matter tissue of the freshly cut brain appears pinkish white to the naked eye because myelin is composed largely of lipid tissue veined with capillaries. Its white color is due to its usual preservation in formaldehyde. A 20 year-old male has around 176,000 km of myelinated axons in his brain [Wikipedia: http://en.wikipedia.org/wiki/White_matter]. | — |
| vulva | The vulva (from the Latin vulva, plural vulvae, see etymology) consists of the external genital organs of the female mammal. This article deals with the vulva of the human being, although the structures are similar for other mammals [Wikipedia: http://en.wikipedia.org/wiki/Vulva]. | — |
| vitreous humor | The clear colorless transparent jelly that fills the eyeball posterior to the lens [Brenda]. | — |
| visceral column | A column of gray matter in the hindbrain and spinal cord of the embryo, represented in the adult by the dorsal nucleus of the vagus, the superior and inferior salivatory and Edinger-Westphal nuclei and the visceral motor neurones of the spinal cord [Wikipedia: http://www.mondofacto.com/facts/dictionary?general+visceral+efferent+column]. | general viseral efferent column |
| ventromedial column | The axons in the ventromedial column of the spinal cord that are involved in the control of posture and locomotion and are under brain stem control [Quizlet: http://quizlet.com/dictionary/ventromedial%2Bpathway/]. | — |
| ventrolateral column | — | — |
| ventricular system | The ventricular system is a set of structures containing cerebrospinal fluid in the brain. It is continuous with the central canal of the spinal cord [Wikipedia: http://en.wikipedia.org/wiki/Ventricular_system]. | — |
| ventral column | — | — |
| vas deferens | A spermatic duct especially of a higher vertebrate that in the human male is a thick-walled tube about two feet (0.61 meters) long that begins at and is continuous with the tail of the epididymis and eventually joins the duct of the seminal vesicle to form the ejaculatory duct [Brenda]. | — |
| vagina | A canal in a female mammal that leads from the uterus to the external orifice of the genital canal [Brenda]. | — |
| uterus | An organ of the female mammal for containing and usually for nourishing the young during development previous to birth [Brenda]. | — |
| uterine tube | The Fallopian tubes, also known as oviducts, uterine tubes, and salpinges (singular salpinx) are two very fine tubes lined with ciliated epithelia, leading from the ovaries of female mammals into the uterus, via the utero-tubal junction. In non-mammalian vertebrates, the equivalent structures are the oviducts [Wikipedia: http://en.wikipedia.org/wiki/Fallopian_tube]. | — |
| umbilical cord | A cord arising from the navel that connects the fetus with the placenta [Brenda]. | — |
| tympanum | The major portion of the middle ear (auris media), consisting of a narrow air-filled cavity in the temporal bone that contains the auditory ossicles. It communicates with the mastoid air cells and the mastoid antrum via the aditus and with the nasopharynx via the auditory tube. The middle ear and the tympanic cavity were formerly regarded as being synonymous [Brenda]. | — |
| tract | A neural pathway, neural tract, or neural face, connects one part of the nervous system with another and usually consists of bundles of elongated, myelin-insulated neurons, known collectively as white matter. Neural pathways serve to connect relatively distant areas of the brain or nervous system, compared to the local communication of grey matter [Wikipedia: http://en.wikipedia.org/wiki/Neural_pathway]. | neural pathway; neural tract; neural face |
| trabecular meshwork | The trabecular meshwork is an area of tissue in the eye located around the base of the cornea, near the ciliary body, and is responsible for draining the aqueous humor from the eye via the anterior chamber (the chamber on the front of the eye covered by the cornea) [Wikipedia: http://en.wikipedia.org/wiki/Trabecular_meshwork]. | — |
| testis | A typically paired male reproductive gland that produces sperm and that in most mammals is contained within the scrotum at sexual maturity [Brenda]. | — |
| synapse | In the nervous system, a synapse is a structure that permits a neuron to pass an electrical or chemical signal to another cell (neural or otherwise). The word "synapse" comes from "synaptein", which Sir Charles Scott Sherrington and colleagues coined from the Greek "syn-" ("together") and "haptein" ("to clasp") [Wikipedia: http://en.wikipedia.org/wiki/Synapse]. | — |
| substantia gelatinosa | The apex of the posterior horn of the gray matter of the spinal cord is capped by a V-shaped or crescentic mass of translucent, gelatinous neuroglia, termed the substantia gelatinosa of Rolando (or SGR) (or gelatinous substance of posterior horn of spinal cord), which contains both neuroglia cells, and small nerve cells. The gelatinous appearance is due to a very low concentration of myelinated fibers.It is named after Luigi Rolando. It corresponds to Rexed lamina II [Wikipedia: http://en.wikipedia.org/wiki/Substantia_gelatinosa_of_Rolando]. | substantia gelatinosa of Rolando; gelatinous substance of posterior horn of spinal cord |
| submandibular gland | One of the three chief, paired salivary glands, predominantly serous, lying partly above and partly below the posterior half of the base of the mandible [Brenda]. | — |
| sublingual gland | Gland situated or administered under the tongue; the smallest of the three salivary glands, occurring in pairs, predominantly mucous in type, and draining into the oral cavity through 10 to 30 sublingual ducts [Brenda]. | — |
| spinal ganglion | A ganglion on the dorsal root of each spinal nerve that is one of a series of ganglia lodging cell bodies of sensory neurons [Brenda]. | — |
| sclera | The tough white outer coat of the eyeball, covering approximately the posterior five-sixths of its surface, and continuous anteriorly with the cornea and posteriorly with the external sheath of the optic nerve [Brenda]. | — |
| sacral parasympathetic nucleus | — | — |
| retrodorsolateral column | — | — |
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