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7th Grade Chapter 16

Circulation

QuestionAnswer
pacemaker a group of cells in the heart that sends out signals to make the heart muscles contract
function of the atria to receive blood that comes into the heart
ventricles pump blood out of the heart
valve prevents blood from flowing backwards
arteries blood vessels that carry blood away from the heart
capillaries blood vessels where materials are exchanged between the blood and the body cells
veins blood vessels that carry blood back to the heart
red blood cells carries oxygen to the body cells
plasma the component of blood that is 90 percent water
white blood cells fight disease
platelets play an important part in forming blood clots
sphygmomanometer an instrument used to measure blood pressure
blood pressure caused by the force with which the ventricles contract
lymph nodes trap disease-causing bacteria
lymphatic system returns the fluid that leaks from capillaries into the surrounding tissues to the blood
atherosclerosis a condition in which artery walls thicken as the result of a buildup of fatty materials
hypertension a condition in which blood pressure is consistently higher than normal
blood carries needed substances to the body cells
blood types are determined by marker molecules on red blood cells
Created by: Mrs. Gordon
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