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chapter 8 cardiovascular system

Horizontales
muscular pump that propels blood to the entire body
Study of the heart
generates weak electrical impulses on the surface of the body.
Sinoatrial node
surge of blood felt in the arteries when blood is pumped from the heart
Capillaries merge to form larger blood vessels
Heart is enclosed in a sac
Middle layer, composed of smooth muscle
Verticales
heart to body cells through a vast network of blood vessels
Small structure that prevents backflow
Upper portion of the right atrium
Arteries branch into smaller vessels until they become microscopic vessels
Membrane that lines the four chambers of the heart
Force exerted by blood against the arterial walls
Returns blood to the heart