Question

Give reason for the following
1. What is advantage of four chambered heart in humans
2 give two point of difference between arteries and veins

Answer 1

Heart supplies blood to all parts of the body.. Hence.. It it's very advantageous..... And that's why without it we can't survive...
ARTERY......
Arteries carry oxygenated blood except pulmonary arteries..
they have narrow lumen.
Flow of blood is fast.
Distrubutes blood from heart to various body parts.....
VEINS
Carry deoxygenated blood except pulmonary veins
Their lumen is wide
Flow of blood is slow and steady
Collect blood from body parts and bring it to the heart
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