Higher Order Thinking Skills (HOTS)
1. Why is blood for testing always drawn from a vein?
2. Why do veins appear blue in colour when they carry blood which is red in colour?
3. Why are veins visible and arteries deep-rooted?
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Answer:
1) bcs vein passes blood from brain to all parts of body
2) bcs it passes from heart to brain heart need more pumping soo it is in blue colour
pls make me brainiest
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