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Anatomy Ch 13

The Vascular System

Anastomosis a connection or joining, especially of blood vessels
Circle of Willis an arterial anastomosis that encircles the pituitary gland and supplies the brain with blood
ductus arteriosus a short fetal blood vessel that takes most blood in the pulmonary artery to the aorta, bypassing the fetal lungs
foramen ovale an opening in the interatrial septum of the fetal heart that permits blood to flow from the right to the left atrium
hepatic portal the pathway of systemic circulation in which venous blood from the digestive organs and the spleen circulates through the liver before returning to the heart
perfusion the circulation of blood to a body area or organ
peripheral resistance the resistance of the blood vessels to the flow of blood
placenta the organ formed in the uterus during pregnancy, made of both fetal and maternal tissue
precapillary sphincter a smooth muscle cell at the beginning of a capillary network that regulates the flow of blood through the network
sinusoid a large, very permeable capillary
umbilical arteries the fetal blood vessels contained in the umbilical cord that carry deoxygenated blood from the fetus to the placenta
umbilical vein the fetal blood vessel contained in the umbilical cord that carries oxygenated blood from the placenta to the fetus
venule a small vein
anaphylactic shock a type of circulatory shock that is the result of a massive allergic reaction
aneurysm a localized sac or bubble that forms in a weak spot in the wall of a blood vessel, usually an artery
arteriosclerosis the abnormal accumulation of lipids and other materials in the walls of arteries
hypertension an abnormally high blood pressure, consistently above 130/85 mm Hg
hypovolemic shock a type of circulatory shock caused by a decrease in blood volume
phlebitis inflammation of a vein
pulse deficit the condition in which the radial pulse count is lower than the rate of the heartbeat heard with a stethoscope
septic shock a type of circulatory shock that is a consequence of a bacterial infection
varicose vein an enlarged, abnormally dilated vein
Created by: Beina
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