Where does the blood absorb oxygen in the human body ?

Name the red pigment in blood which carries oxygen in the human body ?

Which blood cells carry oxygen in the body?

How and where is the blood enriched with oxygen in humans?

Where is digested food absorbed inot blood in human body ?

Where is the digested food absorbed into the blood?

Blood does not transport oxygen in

(a) How many types of blood vessels are there in the human body ? Name them (b) Why does the heart need valves ?

(a) Where in the human body and ovum get fertilised ? (b) Where does a fertilised ovum develop into a baby in the human body?

Where does the digestion of proteins start in the human body?