Tissues

The human body as well as that of other animals (Species) is highly structured into organs and tissues which serve specific functions. Tissue is the organizational level intermediate between cells and organs system which compose the whole organism. All the tissues and cell types defined in an animal organism are hierarchical structured and shall be fully described. o

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  • name description synonyms
    visual apparatus The visual apparatus consists of nervous tissues immediately concerned in giving rise to sensations, supported, protected, and nourished by other parts. Its essential parts are, (1) the retina, a thin membrane lying in the eyeball and containing microscopic elements which are so acted upon by light as to stimulate (2) the optic nerve; this nerve ends (3) in a part of the brain (visual centre) which when stimulated arouses in our consciousness a feeling or sensation of sight. The visual centre may be excited in very many ways, and quite independently of the optic nerve or the retina; as is frequently seen in delirious persons, in whom inflammation or congestion of the brain excites directly the visual centre and gives rise to visual hallucinations [Newell Martin, 1895: http://bookdome.com/health/anatomy/Human-Body/The-Human-Visual-Apparatus.html].
    nasopharynx The upper part of the throat behind the nose. An opening on each side of the nasopharynx leads into the ear [Brenda].
    ulna The ulna is one of the two long bones in the forearm, the other being the radius. It is prismatic in form and runs parallel to the radius, which is shorter and smaller. In anatomical position (i.e. when the arms are down at the sides of the body and the palms of the hands face forward) the ulna is located at the side of the forearm closest to the body (the medial side), the side of the little finger [Wikipedia: http://en.wikipedia.org/wiki/Ulna].
    hair follicle The tubular epithelial sheath that surrounds the lower part of the hair shaft and encloses at the bottom a vascular papilla supplying the growing basal part of the hair with nourishment [Brenda].
    urethra The tube through which urine leaves the body. It empties urine from the bladder [Brenda].
    ureter The tube that carries urine from the kidney to the bladder [Brenda].
    thoracic wall The thoracic wall (or chest wall) is the boundary of the thoracic cavity. The bony portion is known as the thoracic cage. However, the wall also includes muscle, skin, and fascia [Wikipedia: http://en.wikipedia.org/wiki/Thoracic_wall].
    dermis The sensitive vascular inner mesodermic layer of the skin [Brenda].
    hypopharynx The portion of the pharynx that lies below the upper edge of the epiglottis and opens into the larynx and esophagus [Brenda].
    peripheral nerve The peripheral nerves include the 12 cranial nerves, the spinal nerves and roots, and what are called the autonomic nerves that are concerned specifically with the regulation of the heart muscle, the muscles in blood vessel walls, and glands [Brenda].
    small intestine The part of the intestine that lies between the stomach and colon, consists of duodenum, jejunum, and ileum, secretes digestive enzymes, and is the chief site of the absorption of digested nutrients. The proximal portion of the intestine [Brenda].
    adrenal cortex The outer portion of the adrenal glands that produces several steroid hormones, including cortisol and aldosterone [Brenda].
    epidermis The outer epithelial layer of the external integument of the animal body that is derived from the embryonic epiblast; specifically: the outer nonsensitive and nonvascular layer of the skin of a vertebrate that overlies the dermis [Brenda].
    oropharynx The Oropharynx (oral part of the pharynx) reaches from the Uvula to the level of the hyoid bone [Wikipedia: http://en.wikipedia.org/wiki/Oropharynx].
    gastric mucosa The mucous coat of the stomach [Brenda].
    large intestine The more terminal division of the vertebrate intestine that is wider and shorter than the small intestine, typically divided into cecum, colon, and rectum, and concerned especially with the resorption of water and the formation of feces [Brenda].
    venous media The middle coat of blood vessel walls, composed principally of thin, cylindrical, smooth muscle cells and elastic tissue. It accounts for the bulk of the wall of most arteries. The smooth muscle cells are arranged in circular layers around the vessel, and the thickness of the coat varies with the size of the vessel [[MeSH: http://www.nlm.nih.gov/cgi/mesh/2012/MB_cgi?mode=&term=+L+o+w+e+r+ +l+i+m+b+&field=entry].
    arterial media The middle coat of blood vessel walls, composed principally of thin, cylindrical, smooth muscle cells and elastic tissue. It accounts for the bulk of the wall of most arteries. The smooth muscle cells are arranged in circular layers around the vessel, and the thickness of the coat varies with the size of the vessel [MeSH: http://www.nlm.nih.gov/cgi/mesh/2012/MB_cgi?mode=&term=+L+o+w+e+r+ +l+i+m+b+&field=entry].
    myocardium The middle and thickest layer of the heart wall, composed of cardiac muscle [Brenda].
    lingual tonsil The lingual tonsils are rounded masses of lymphatic tissue that cover the posterior region of the tongue [Wikipedia: http://en.wikipedia.org/wiki/Lingual_tonsils].
    lesser omentum The lesser omentum (small omentum; gastrohepatic omentum; omentum minus) is the double layer of peritoneum that extends from the liver to the lesser curvature of the stomach and the start of the duodenum [Wikipedia: http://en.wikipedia.org/wiki/Lesser_omentum].
    islets of Langerhans The islets of Langerhans are the regions of the pancreas that contain its endocrine (i.e., hormone-producing) cells. Discovered in 1869 by German pathological anatomist Paul Langerhans at the age of 22, the islets of Langerhans constitute approximately 1 to 2% of the mass of the pancrea [Wikipedia: http://en.wikipedia.org/wiki/Islets_of_Langerhans].
    male reproductive system The internal and external reproductive organs in the male [Brenda].
    female reproductive system The internal and external reproductive organs in the female [Brenda].
    venous intima The innermost coat of blood vessels, consisting of a thin lining of endothelial cells longitudinally oriented and continuous with the endothelium of capillaries on the one hand and the endocardium of the heart on the other [Medical Dictionary: http://www.medical-dictionary.cc/what-does/venous-intima-mean].
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