S — Chand Class 10 Biology Pdf Free Download Life Processes

Why do arteries have thick elastic walls? Answer: Because blood emerges from the heart under high pressure; elastic walls help maintain pressure and push blood forward.

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Why is the small intestine called the site of complete digestion? Answer: Because it receives bile from the liver, pancreatic juice from the pancreas, and its own intestinal juice (Succus entericus) which breaks down proteins, fats, and carbs completely. Why do arteries have thick elastic walls