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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.

High-quality diagrams of the human digestive system, heart, and kidneys help with visual learning. S Chand Class 10 Biology Pdf Free Download Life Processes

: The chapters are filled with colorful diagrams and illustrations that are essential for board exams. Question Variety Why do arteries have thick elastic walls

Salivary amylase (ptyalin); it breaks down starch into simple sugars like maltose. S Chand Class 10 Biology Pdf Free Download Life Processes