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Questions and Answers
What is the total cross-sectional surface area of capillaries compared to the aorta?
What is the total cross-sectional surface area of capillaries compared to the aorta?
- 100 times less
- 10 times less
- 1000 times more
- 800 times more (correct)
What percentage of blood vessels in the body are capillaries?
What percentage of blood vessels in the body are capillaries?
- 25%
- 50%
- 90% (correct)
- 10%
What is the main characteristic of capillaries?
What is the main characteristic of capillaries?
- Thick walls
- High blood pressure
- Small diameter (correct)
- Low blood flow
