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Oxygenated blood from lungs is carried to the heart by

Oxygenated blood from lungs is carried to the heart by

Name the organ from which oxygenated blood goes into the heart.

The blood vessel which carries oxygenated blood from the lungs to the heart is :

Oxygenated blood returns from lungs to the heart through :-

Assertion : The heart of fish contains only deoxygenated blood. Reasoning : Oxygenated blood does not return back to the heart in fishes.

Assertion : The heart of fish contains only deoxygenated blood. Reasoning : Oxygenated blood does not return back to the heart in fishes.

Give reasons for : Oxygenated and deoxygenated bloods are separate in the heart of mammals.

Oxygen-rich blood from the lungs comes to the thin-walled upper chamber of the heart on the left. The left upper chamber (A) then relaxes. It then contracts and the blood is allowed to enter the next chamber (B), as it expands. When the muscular left lower chamber of heart contracts the blood is pumped out to the body via aorta. Deoxygenated blood reaches from the body to the upper chamber on the right side of heart (C) and it expands. As this part contracts, the corresponding lower chamber (D) dilates. This transfers the blood to right ventricle, which in turn pumps it to the lungs for oxygenated. Which chambers of human heart contain oxygenated blood?