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Questions and Answers
What is the main function of veins in the blood vessel network?
What is the main function of veins in the blood vessel network?
- To distribute blood to different organs and collect waste substances from them
- To transport oxygen-rich blood from the heart to all parts of the body
- To branch out into smaller capillaries and form arteries
- To collect waste substances from the organs and transport blood back to the heart (correct)
What is the function of capillaries in the blood vessel network?
What is the function of capillaries in the blood vessel network?
- To distribute blood to different organs and collect waste substances from them (correct)
- To transport oxygen-deficient and carbon dioxide-rich blood back to the heart
- To carry oxygen-rich blood from the heart to all parts of the body
- To form veins that collect waste substances from the organs
Why do arteries have thick elastic walls?
Why do arteries have thick elastic walls?
- To carry oxygen-deficient blood to the heart
- To withstand the high pressure of blood flow (correct)
- To prevent backflow of blood
- To allow the branching out into smaller capillaries
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