| cardiac valve | A heart valve normally allows blood flow in only one direction through the heart. The four valves commonly represented in a mammalian heart determine the pathway of blood flow through the heart. A heart valve opens or closes incumbent upon differential blood pressure on each side [Wikipedia: http://en.wikipedia.org/wiki/Heart_valve]. | — |
| cardiac conducting system | The electrical conduction system that controls the heart rate. This system generates electrical impulses and conducts them throughout the muscle of the heart, stimulating the heart to contract and pump blood [MedTerms: http://www.medterms.com/script/main/art.asp?articlekey=8407]. | — |
| artery | Any of the tubular branching muscular- and elastic-walled vessels that carry blood from the heart through the body [Brenda]. | — |
| aorta | The great arterial trunk that carries blood from the heart to be distributed by branch arteries through the body [Brenda]. | — |
| arterial intima | The arterial intima incldues the endothelium, interla elastic lamina, and all intervening tissues [Stehbens, 1995: http://www.deepdyve.com/lp/elsevier/definition-of-the-arterial-intima-LB2GoUv3it]. | — |
| 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]. | — |
| arterial adventitia | Adventitia is the outermost connective tissue covering of any organ, vessel, or other structure. It is also called the tunica adventitia or the tunica externa [Wikipedia: http://en.wikipedia.org/wiki/Adventitia]. | — |
| vein | Any of the tubular branching vessels that carry blood from the capillaries toward the heart [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]. | — |
| 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]. | — |
| venous adventitia | The adventitia (tunica adventitia) is the outer coat of the vessel, and consists of connective tissue, nerves and vessel capillaries (vasa vasorum). It links the vessels to the surrounding tissues [Gray's Anatomy]. | — |
| capillary | A capillary tube; especially: any of the smallest blood vessels connecting arterioles with venules and forming networks throughout the body [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]. | — |
| nose | 1a: The part of the face that bears the nostrils and covers the anterior part of the nasal cavity; broadly: this part together with the nasal cavity.n1b: The anterior part of the head at the top or end of the muzzle: snout, proboscis.n2: The vertebrate olfactory organ [Brenda]. | — |
| sinus | Sinus is a sack or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue. In common usage, "sinus" usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it. Each individual has four paired cavities located in the cranial bone or skull. These cavities are vital for a number of reasons [Wikipedia: http://en.wikipedia.org/wiki/Sinus_(anatomy)]. | — |
| larynx | The modified upper part of the trachea of air-breathing vertebrates that in humans, most other mammals, and a few lower forms contains the vocal cords [Brenda]. | — |
| trachea | 1: The cartilaginous and membranous tube descending from the larynx and branching into the right and left main bronchi. It is kept patent by a series of about twenty transverse horseshoe-shaped cartilages. Called also windpipe.n2: One of a system of minute tubes ramifying throughout the body of a terrestrial arthropod and delivering air to the tissues. Called also tracheal tubule [Brenda]. | — |
| bronchus | Either of the two primary divisions of the trachea that lead respectively into the right and the left lung [Brenda]. | — |
| lung | One of the usually paired compound saccular thoracic organs that constitute the basic respiratory organ of air-breathing vertebrates [Brenda]. | — |
| alveolus | A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place [Brenda]. | — |
| pleura | The delicate serous membrane that lines each half of the thorax of mammals and is folded back over the surface of the lung of the same side [Brenda]. | — |
| hematological system | The structures of the hematologic or hematopoietic system include the blood, blood vesels, and blood-forming organs (bone marrow, spleen, liver, lymph nodes, and thymus gland). The hematological system also plays an inportant role in hormone transport, the inflammotory and immune responses, temperature regulation, fluid-electrolyte balancem and acid-base balance [http://www.google.de/url?sa=t&rct=j&q=the%20structures%20of%20the%20hematologic%20or%20hematopoietic%20system%20include%20the%20blood%2C%20blood%20vesels%2C%20and%20blood-forming%20organs%20(bone%20marrow%2C%20spleen%2C%20liver%2C%20lymph%20nodes%2C%20and%20thymus%20gland).%20the%20hematological%20system%20also%20plays%20an%20inportant%20role%20in%20hormone%20transport%2C%20the%20inflammotory%20and%20immune%20responses%2C%20temperature%20regulation%2C%20fluid-electrolyte%20balancem%20and%20acid-base%20balance&source=web&cd=7&ved=0CF8QFjAG&url=http%3A%2F%2Fwww.reocities.com%2Fjtiongco_99_2000%2FMS%2Fms_lec5-1_hematologic_system.doc&ei=MdVQT9fNOsXV0QX_xfHrCw&usg=AFQjCNEUwaHxQc61N6EMZWYnMKlQ9IW8ug]. | — |
| bone marrow | The soft, fatty, vascular tissue that fills most bone cavities and is the source of red blood cells and many white blood cells [Brenda]. | — |
| blood | 1: The fluid that circulates in the heart, arteries, capillaries, and veins of a vertebrate animal carrying nourishment and oxygen to and bringing away waste products from all parts of the body.n2: A comparable fluid of an invertebrate [Brenda]. | — |
| lymphoreticular system | The mononuclear phagocyte system is a part of the immune system that consists of the phagocytic cells located in reticular connective tissue. The cells are primarily monocytes and macrophages, and they accumulate in lymph nodes and the spleen. The Kupffer cells of the liver and tissue histiocytes are also part of the MPS [Wikipedia: http://en.wikipedia.org/wiki/Mononuclear_phagocyte_system]. | — |
Comment on This Data Unit