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Biology CBSE Live product
Class 10 (2025-26)
Life processes
Annual Revision V - Life processes
1.
Vein
Question:
1
m.
Section A: Answer the following in one word or one sentence.
Give reason:
Veins have valves whereas arteries do not.
Veins carry deoxygenated blood back to the heart and have valves that
allow blood to flow in one direction
prevent backward flow of blood
protects the heart from shocks
Increase blood pressure in arteries
allow blood to flow in bi-direction
, ensuring blood flows toward the heart and maintains circulation.
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