ch6: cardiovascular system Flashcards
1
Q
heart
A
functions as a pump to move blood throughout the body
2
Q
artery
A
thick walled vessels that carry blood away from the heart. they propel blood with each contraction of the heart.
smaller branches are venules
3
Q
vein
A
vessels that carry blood toward the heart. they are thinner walled than arteries and contain valves to prevent back flow. smaller branches are venules.
4
Q
capillary
A
the smallest blood vessels which connect arterioles to venules. they aid in the exchange of oxygen and nutrients between blood and body cells.
5
Q
endocardium
A
innermost layer of cells that lines the atria
6
Q
myocardium
A
muscular layer of the heart
7
Q
pericardium
A
outermost layer of the heart. a membrane that surrounds the heart and secretes pericardial fluid.
