The human body has an organ A which acts as a double pump. The oxygenated blood coming from the lungs through a blood vessel B enters the upper left chamber C of the double pump. When chamber C contracts, then blood goes into lower left chamber D. The contraction of chamber D forces the blood to go into a blood vessel E which supplies oxygenated blood to all the organs of the body (except the lungs). The deoxygenated blood coming out of the body organs is taken by a blood vessel F to the right upper chamber G of the pumping organ. Contraction of chamber G forces the deoxygenated blood into right lower chamber H. And finally the contraction of chamber H sends the deoxygenated blood into lungs through a blood vessel I.
(a) What is organ A ?

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Solution

Organ A is Heart.
Heart is really a double pump. The left side of heart (left atrium and left ventricle) acts as one pump which pumps blood into the whole body, except the lungs. The right side of heart (right atrium and right ventricle) acts as another pump which pumps blood only into the lungs.

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Q. 12.a) Name the blood vessel that brings deoxygenated blood to human heart.
b) Which chamber of human heart receives deoxygenated blood?
c) Explain how deoxygenated blood from this chamber is sent to lungs for oxygenation. (3)

Q. Match the chambers of the human heart in Column A to its function in Column B.

\begin{matrix} C o l u m n A & C o l u m n B (i) R i g h t a t r i u m & (a) P u m p s d e o x y g e n a t e d b l o o d t o l u n g s (i i) L e f t a t r i u m & (b) R e c e i v e s o x y g e n a t e d b l o o d f r o m l u n g s (i i i) R i g h t v e n t r i c l e & (c) P u m p s o x y g e n a t e d b l o o d t o t h e b o d y (i v) L e f t v e n t r i c l e & (d) R e c e i v e s d e o x y g e n a t e d b l o o d f r o m t h e b o d y \end{matrix}

(a) Name the blood vessel that brings oxygenated blood to the human heart.
(b) Which chamber of the human heart receives deoxygenated blood?
(c) Describe the process by which deoxygenated blood from this chamber is sent to all parts of the body.

Q. In fishes, a -chambered heart pumps deoxygenated blood to the , and this blood gets oxygenated and moves directly to all the body parts.

Anwer the following question: [5 MARKS]
1. Name the vessels which carries blood to the heart.
2. Name the vessels which carries blood away from the heart.
3. Name the blood vessel that brings oxygenated blood to the human heart.
4. Which chamber of human heart receives deoxygenated blood ?
5. Describe how deoxygenated blood from this chamber is sent to all parts of the body.

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Systemic Circuit

Standard VI Biology

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Organ A is Heart. Heart is really a double pump. The left side of heart (left atrium and left ventricle) acts as one pump which pumps blood into the whole body, except the lungs. The right side of heart (right atrium and right ventricle) acts as another pump which pumps blood only into the lungs.

Organ A is Heart.
Heart is really a double pump. The left side of heart (left atrium and left ventricle) acts as one pump which pumps blood into the whole body, except the lungs. The right side of heart (right atrium and right ventricle) acts as another pump which pumps blood only into the lungs.