IMG_0197 - G-26 cLossARY arch l In the embryo any ofsix...

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G-26 cLossARY aortic arch l. In the embryo, any ofsix pairs of biood vessels that arise rostral to the heart and loop mainly through the pharyngeal arches; some ofthese iater give rise to carotid and pulmonary arteries and the permanent aortic arch. (fig. 21.35) 2. A segment ofthe adult aorta that arches over the heart like an inverted U; gives rise to the brachiocephalic trunk, left common carotid artery, and left subclavian artery; then continues posterior to the heart as the descending aorta. (fig.21.16) apex The summit or a pointed part of an organ or body region such as the heart, lung, or shoulder. apical surface The uppermost surface of an epitheliai cell, opposite from the basement membrane, usually exposed to the lumen of an organ. (fig.2.5) apocrine pertaining to certain sweat glands with large lumens and relatively thiclg aromatic secretions, and to similar glands such as the mammary gland; *formerly thought to form secre[ions by pinching off bits of apica.l cytoplasm. (fig, 5.10) aponeurosls A broad, flat tendon that attaches a muscle to a bone or to other soft tissues in such locations as the abdominal wall and deep to the scalp, apoptosis The normal death of cells that have completed their function, usually in a process involving self-destruction of the cell's DNA, shrinkage ofthe cel1, and its phagocytosis by a macrophage; also called pro3rammed cell death. Compare necrosis, appendlcular (AP-en-DIC-ycu-1ur) Pertainingto the limbs and their supporting skeletal girdles. (flg,7,1) arcuate (AR-cue-et) Making a sharp L- or U- shaped bend (arc), or forming an arch, as in arcuate arterles ofthe kidneys and uterus, areolartlceue (AIR-ee-OHJur) Afibrous connective tissue with looeely organized, widely spaced fibers and cells and an abundance offluid- filled space; found under nearly every epithelium, among other places. (fig, 3.14) arrector plli See piloerector, arteriole A small artery that empties into a metarteriole or capillary. artery Any blood vessel that conducts blood away from the heart, or in the case ofcoronary arteries, away from the aorta and into the heart wall. articular cartllage A thin layer ofhyaline cartilage
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This note was uploaded on 02/09/2012 for the course BIO 102 taught by Professor William during the Spring '11 term at Harvard.

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