| pons | A broad mass of chiefly transverse nerve fibers conspicuous on the ventral surface of the brain of man and lower mammals at the anterior end of the medulla oblongata [Brenda]. | — |
| renal corpuscle | A mass of arterial capillaries enveloped in a capsule and attached to a tubule in the kidney [Brenda]. | — |
| trophoblast | A thin layer of ectoderm that forms the wall of many mammalian blastulas and functions in the nutrition and implantation of the embryo [Brenda]. | — |
| umbilical vein | A vein that passes through the umbilical cord to the fetus and returns the oxygenated and nutrient blood from the placenta to the fetus [Brenda]. | — |
| lateral ventricle | An internal cavity in each cerebral hemisphere that consists of a central body and three cornua including an anterior one curving forward and outward, a posterior one curving backward, and an inferior one curving downward [Brenda]. | — |
| macula lutea | An irregular yellowish depression on the retina, about 3 degrees wide, lateral to and slightly below the optic disk; it is the site of absorption of short wavelengths of light, and it is thought that its variation in size, shape, and coloring may be related to variant types of color vision [Brenda]. | macula; macula of retina |
| auricle | Auricle is an Anglicization of Latin auricula, from auris "ear" and -cula, a diminutive suffix [Wikipedia: http://en.wikipedia.org/wiki/Auricle]. In animal anatomy, the pinna (Latin for feather) is the visible part of the ear that resides outside of the head (this may also be referred to as the auricle or auricula) [Wikipedia: http://en.wikipedia.org/wiki/Pinna_(anatomy)]. | pinna; auricle; auricula |
| seminal vesicle | Either of a pair of glandular pouches that lie one on either side of the male reproductive tract and in the human male secrete a sugar- and protein-containing fluid into the ejaculatory duct [Brenda]. | — |
| cerebellum nuclei | Four accumulations of gray substance embedded in the white substance of the cerebellum, comprising the nucleus dentatus, nucleus emboliformis, nucleus globosus, and nucleus fastigii. (Dorland, 28th ed) [MeSH] | dentate nucleus; nucleus dentatus; nucleus emboliformis; nucleus fastigii; Nucleus Globosus |
| blastocyst inner cell mass | In early embryogenesis of most eutherian mammals, the inner cell mass (abbreviated ICM and also known as the embryoblast or pluriblast, the latter term being applicable to all mammals) is the mass of cells inside the primordial embryo that will eventually give rise to the definitive structures of the fetus. This structure forms in the earliest steps of development, before implantation into the endometrium of the uterus has occurred. The ICM lies within the blastocoele (more correctly termed "blastocyst cavity," as it is not strictly homologous to the blastocoele of anamniote vertebrates) and is entirely surrounded by the single layer of cells called trophoblast [Wikipedia: http://en.wikipedia.org/wiki/Inner_cell_mass]. | inner cell mass |
| foreskin | In male human anatomy, the foreskin is a generally retractable double-layered fold of skin and mucous membrane that covers the glans penis and protects the urinary meatus when the penis is not erect. It is also described as the prepuce, a technically broader term that also includes the clitoral hood in women, to which the foreskin is embryonically homologous [Wikipedia: http://en.wikipedia.org/wiki/Foreskin]. | — |
| renal tubule | One of the minute, reabsorptive, secretory, and collecting canals, made up of basement membrane lined with epithelium, that form the substance of the kidneys [Brenda]. | — |
| seminiferous tubule | One of two or three twisted, curved tubules in each lobule of the testis in which spermatozoa develop [Brenda]. | — |
| arachnoid | The arachnoid mater, is one of the three meninges, the protective membranes that cover the brain and spinal cord. It is named after the Greek words "Arachne" and suffix "-oid" -"in the image of", and "mater" the Latin word for mother, because of the fine spider web-like appearance of the delicate fibres of the arachnoid which extend down through the subarachnoid space and attach to the pia mater. It is interposed between the two other meninges, the more superficial dura mater and the deeper pia mater, from which it is separated by the subarachnoid space. The delicate arachnoid layer is attached to the inside of the dura and surrounds the brain and spinal cord. It does not line the brain down into its sulci (folds), as does the pia mater, with the exception of the longitudinal fissure, which divides the left and right cerebral hemispheres. Cerebrospinal fluid flows under this membrane in the subarachnoid space. The pia mater covering the brain is referred to as the "arachnoidea encephal", and the portion covering the spinal cord as the "arachnoidea spinalis". The arachnoid and pia mater are sometimes considered as a single structure, the leptomeninx, or the plural version, leptomeninges. ("Lepto"- from the Greek root meaning "thin"). Similarly, the dura in this situation is called the pachymeninx [Wikipedia: http://en.wikipedia.org/wiki/Arachnoid_mater]. | — |
| basal nuclei | The basal ganglia (or basal nuclei) are a group of nuclei of varied origin in the brains of vertebrates that act as a cohesive functional unit. They are situated at the base of the forebrain and are strongly connected with the cerebral cortex, thalamus and other brain areas. The basal ganglia are associated with a variety of functions, including voluntary motor control, procedural learning relating to routine behaviors or "habits" such as bruxism, eye movements, and cognitive, emotional functions. Currently popular theories implicate the basal ganglia primarily in action selection, that is, the decision of which of several possible behaviors to execute at a given time. Experimental studies show that the basal ganglia exert an inhibitory influence on a number of motor systems, and that a release of this inhibition permits a motor system to become active. The "behavior switching" that takes place within the basal ganglia is influenced by signals from many parts of the brain, including the prefrontal cortex, which plays a key role in executive functions [Wikipedia: http://en.wikipedia.org/wiki/Basal_ganglia]. | — |
| osseous labyrinth | The bony labyrinth or osseous labyrinth consists of three parts: the vestibule, semicircular canals, and cochlea. These are cavities hollowed out of the substance of the bone, and lined by periosteum; they contain a clear fluid, the perilymph, in which the membranous labyrinth is situated [Wikipedia: http://en.wikipedia.org/wiki/Bony_labyrinth]. | bony labyrinth |
| epithalamus | The caudal part of the roof and the adjoining lateral walls of the third ventricle of the diencephalon, comprising the habenular nuclei and their commissure, pineal body, and commissure of the epithalamus [Brenda]. | — |
| cervix | The cervix (from the Latin cervix uteri, meaning "neck of the womb") is the lower, narrow portion of the uterus where it joins with the top end of the vagina. It is cylindrical or conical in shape and protrudes through the upper anterior vaginal wall. Approximately half its length is visible with appropriate medical equipment; the remainder lies above the vagina beyond view. The cervix has an opening to allow sperm and menstrual fluid to move through [Wikipedia: http://en.wikipedia.org/wiki/Cervix]. | — |
| external acoustic meatus | The ear canal (external auditory meatus, external acoustic meatus) (meatus acusticus externus) , is a tube running from the outer ear to the middle ear. The adult human ear canal extends from the pinna to the eardrum and is about 35 mm in length and 5 to 10 mm in diameter [Wikipedia: http://en.wikipedia.org/wiki/Ear_canal]. | — |
| endometrium | The endometrium is the inner membrane of the mammalian uterus [Wikipedia: http://en.wikipedia.org/wiki/Endometrium]. | — |
| pia mater | The fine vascular membrane that closely envelops the brain and spinal cord under the arachnoid and the dura mater [Brenda]. | — |
| fourth ventricle | The fourth ventricle is one of the four connected fluid-filled cavities within the human brain. The fourth ventricle extends from the cerebral aqueduct (aqueduct of Sylvius) to the obex, and is filled with cerebrospinal fluid (CSF). The fourth ventricle has a characteristic diamond shape in cross-sections of the human brain. It is located within the pons or in the upper part of the medulla [Brenda]. | — |
| fovea centralis | The fovea centralis, also generally known as the fovea (the term fovea comes from the Latin, meaning pit or pitfall), is a part of the eye, located in the center of the macula region of the retina [Wikipedia: http://en.wikipedia.org/wiki/Fovea_centralis]. | — |
| glans | The glans (Latin for "acorn") is a vascular structure located at the tip of the penis in men or a homologous genital structure of the clitoris in women [Wikipedia: http://en.wikipedia.org/wiki/Glans]. | — |
| corpus callosum | The great band of commissural fibers uniting the cerebral hemispheres of higher mammals including humans [Brenda]. | — |
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