Circulatory System Flashcards
1
Q
platelets
A
clot blood when blood vessels are damaged
2
Q
arteries
A
blood is forced into the arteries from the heart, away from the heart, high pressure- therefore thick walls are needed to withstand the pressure
3
Q
cappillaries
A
small blood cells - only one cell thick, allow for the transfer of materials between the cells and the bloodstream
4
Q
veins
A
the walls of veins are thin and less elastic, back to the heart, the veins have valves inside to prevent backflow
