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11.3 Anatomy Vocab

TermDefinition
aortic arch the curved portion of the aorta between the ascending and descending parts of the aorta
arteries vessels that carry blood away from the heart
arterioles microscopic arteries that connect with capillaries
brachial artery the artery located at the fold of the elbow where the brachial pulse is detected
capillaries small, thin walled vessels where oxygen and carbon dioxide gas exchange occurs
capillary beds network of interwined vessels formed by multiple capillaries
carotid artery the artery located on the side of the neck, where the carotid artery is felt
coronary sinus large venous channel between the left atrium and left ventricle on the posterior side of the heart that empties into the right atrium at the junction of the fourth chambers
ductus arteriosus a short, broad vessel in the fetus that connects the left pulmonary artery with the descending aorta, allowing most of the blood to bypass the infant's lungs
foramen ovale opening in the septal wall between the atria
precapillary sphincter a band of smooth muscle fibers that encircles the capillaries at the arteriole capillary junctions and controls blood flow to the tissues
pulmonary circulation circulation of oxygen poor blood from the right ventricle, through the lungs, and returning to the left atrium with oxygen rich blood
radial artery the artery located on the thumb side of the wrist, where the radial pulse is detected
systemic circulation circulation of oxygenated blood through the arteries, capillaries, and veins of the circulatory system, from the left ventricle to the right atrium
tunica externa the outermost layer of a blood vessel, composed mostly of fibrous connective tissue that supports and protects the vessel
tunica intima the innermost layer of a blood vessel, composed of a single layer of squamous epithelial cells over a sheet of connective tissue
tunica media the thicker middle layer of a blood vessel that contains smooth muscle cells, elastic fibers, and collagen
veins vessels that carry blood to the heart
venules the smallest veins; connect the capillaries with the larger systemic veins
vital signs measurements of pulse and blood pressure
Created by: espindan1
 

 



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