Heart And Circulatory Flashcards
(6 cards)
1
Q
Why is left side of heart thicker
A
- thicker walks
- higher pressure needed to pump blood to whole body
2
Q
We have a double circulatory system
A
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3
Q
What is meant by a double circulatory system
A
- blood enters heart twice every time it is pumped around body
4
Q
Features of arteries
A
- carry blood away from heart (like pulmonary artery)
- thick walls
- thin lumen
- (to withstand high pressure)
5
Q
Features of capillaries
A
- one cell thick walls
- to allow fast diffusion between blood + cells
6
Q
Features of vein
A
- carry blood to heart (pulmonary vein)
- thin walls
- wide lumen
- wide valves
- (to prevent backflow of blood)
