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Rebecca Braga
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Paper 2 Bio
Biology
141 cards
Cards (146)
Blood flow
1. Flows from the heart
2. Through arteries
3. Into capillaries
4. Then into veins
5. Back to the heart
Arteries
Thick
walls with
elastic
tissue
Larger
lumen than capillaries
High
blood pressure
Capillaries
Single cell thick
walls
Small
lumen
Low
blood pressure
Slow
blood flow
Veins
Thin walls
Larger lumen
than
capillaries
Low blood pressure
Contain
valves
to prevent
backflow
The heart pumps
blood
through the
circulatory
system
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