| omentum | A sheet of fat that is covered by peritoneum. The greater omentum is attached to the bottom edge of the stomach, and hangs down in front of the intestines. Its other edge is attached to the transverse colon. The lesser omentum is attached to the top edge of the stomach, and extends to the undersurface of the liver [Omentum: http://www.medterms.com/script/main/art.asp?articlekey=4632]. | — |
| sweat gland | A simple tubular gland of the skin that secretes perspiration, is widely distributed in nearly all parts of the human skin, and consists typically of an epithelial tube extending spirally from a minute pore on the surface of the skin into the dermis or subcutaneous tissues where it ends in a convoluted tuft [Brenda]. | — |
| nephron | A single excretory unit of the vertebrate kidney [Brenda]. | — |
| olfactory tubercle | A small area of gray matter behind the olfactory trigone that is noted for receiving dopaminergic neurons from the substantia nigra and the reticular formation which have been implicated in schizoaffective disorders [Brenda]. | — |
| nucleus intercalatus | A small collection of nerve cells in the medulla oblongata lying lateral to the hypoglossal nucleus [Mondofacto: http://www.mondofacto.com/facts/dictionary?Staderini's+nucleus]. | intercalated nucleus of medulla; nucleus staderini; staderini's nucleus; staderinis nucleus |
| suprachiasmatic nucleus | A small group of neurons situated immediately dorsal to the optic chiasma in the anterior hypothalamus [Brenda]. | — |
| pineal gland | A small, cone-shaped organ in the brain of most vertebrates that secretes the hormone melatonin [Brenda]. | — |
| gall bladder | A small, pear-shaped muscular sac, located under the right lobe of the liver, in which bile secreted by the liver is stored until needed by the body for digestion [Brenda]. | — |
| mesenchymal stem cell | A special adult stem cell, which is a multipotent stem cell, that can be found in bone marrow and can produce all cell types of bone, cartilage, fat, blood, and connective tissues [Brenda]. | — |
| dendritic cell | A special type of cell that is a key regulator of the immune system, acting as a professional antigen-presenting cell, APC, capable of activating naive T cells and stimulating the growth and differentiation of B cells. Dendritic cells are found, for example, in the lymph nodes and spleen. As an APC, a dendritic cell can retain antigen for long periods on its surface, present the antigen to a T or B cell and so influence their behavior [Brenda]. | — |
| cartilage | A specialized, fibrous connective tissue, forming most of the temporary skeleton of the embryo, providing a model in which most of the bones develop, and constituting an important part of the growth mechanism of the organism. It exists in several types, the most important of which are hyaline cartilage, elastic cartilage, and fibrocartilage. Also used as a general term to designate a mass of such tissue in a particular site in the body [Brenda]. | — |
| 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]. | — |
| epididymis | A system of ductules emerging posteriorly from the testis that holds sperm during maturation and that forms a tangled mass before uniting into a single coiled duct which is continuous with the vas deferens [Brenda]. | — |
| respiratory system | A system of organs subserving the function of respiration and in air-breathing vertebrates consisting typically of the lungs and their nervous and circulatory supply and the channels by which these are continuous with the outer air [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]. | — |
| endocardium | A thin serous membrane lining the cavities of the heart [Brenda]. | — |
| amnion | A thin, tough, membranous sac that encloses the embryo or fetus of a mammal, bird, or reptile. It is filled with a serous fluid in which the embryo is suspended [Brenda]. | — |
| alveolus | A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place [Brenda]. | — |
| tendon | A tough cord or band of dense white fibrous connective tissue that unites a muscle with some other part (as a bone) and transmits the force which the muscle exerts [Brenda]. | — |
| supraspinal nucleus | A transverse section across the lower medulla oblongata intersects the dorsal, lateral and ventral funiculi, which are continuous with their counterparts in the spinal cord. The ventral funiculi are separated from the central grey matter by corticospinal fibres, which cross in the pyramidal decussation to reach the contralateral lateral funiculi. The decussation displaces the central grey matter and central canal dorsally. Continuity between the ventral grey column and central grey matter, which is maintained throughout the spinal cord, is lost. The column subdivides into the supraspinal nucleus (continuous above with that of the hypoglossal nerve), which is the efferent source of the first cervical nerve, and the spinal nucleus of the accessory nerve, which provides some spinal accessory fibres and merges rostrally with the nucleus ambiguus [Gray's Anatomy]. | — |
| tubule | A tubule is a very small tube or fistular structure. A system of surface-connected membranes in muscle that enables a nerve impulse to travel to the interior of the muscle fibre. In anatomy, a tubule is a minute tube lined with glandular epithelium [Wikipedia: http://en.wikipedia.org/wiki/Tubule]. | — |
| testis | A typically paired male reproductive gland that produces sperm and that in most mammals is contained within the scrotum at sexual maturity [Brenda]. | — |
| skeletal muscle | A usually voluntary muscle made up of elongated, multinucleated, transversely striated muscle fibers, having principally bony attachments [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]. | — |
| wrinkle | A wrinkle is a fold, ridge or crease in the skin. Skin wrinkles typically appear as a result of aging processes such as glycation or, temporarily, as the result of prolonged (more than a few minutes) immersion in water. Wrinkling in the skin is caused by habitual facial expressions, aging, sun damage, smoking, poor hydration, and various other factors. With prolonged water exposure, the outer layer of skin starts to absorb water. The skin doesn't expand evenly, causing it to wrinkle. Depletion of water in the body, as occurs with dehydration, can also cause this puckering of the skin. Cortisol causes degradation of skin collagen [Wikipedia: http://en.wikipedia.org/wiki/Wrinkle]. | — |
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