on the basis of your understanding of the Tomowy pro
un-walled upper chamber of the heart on the left.
wacts and the blood is allowed to enter the next
lower chamber of heart contracts, the blood is
u ull related studied concepts.
Oxygen-rich blood from the lungs comes to the thin-walled up!
The left upper chamber (A) then relaxes. It then contracts and the
chamber (B), as it expands. When the muscular left lower chamber
pumped out to the body via aorta.
Deoxygenated blood reaches from the body to the upper chamber on the
expands. As this part contracts, the corresponding lower chamber (D) dilates.
to right ventricle, which in turn pumps it to the lungs for oxygenation.
(a) What does A, B, C and D represents in the above passage.
(b) Which chambers of human heart contain oxygenated blood?
(i) A and B
(ii) A and C
(iii)C and B
(iv) C and D
(c) What is the correct route of blood in a human?
(i) A - B - Lungs - C D
(ii) A B → D C Lungs
per chamber on the right side of heart (C) and it
er chamber (D) dilates. This transfers the blood to right ventricle, which in turn pumps it to
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