In amphibians and reptiles the left atrium receives oxygenated blood from _____________.

Gills

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Lungs

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Skin

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All of above

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Solution

The correct option is C All of above
D. All of above
Reason: In amphibians and reptiles, the left atrium receives oxygenated blood from the gills/lungs/skin and the right atrium gets the deoxygenated blood from other body parts. However, they get mixed up in the single ventricle which pumps out mixed blood.

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Similar questions

Q. Assertion :Double circulation is incomplete in amphibians and reptiles Reason: Unlike in birds and mammals, in amphibian and reptiles, the left atrium receives oxygenated blood and right atrium receives deoxygenated blood.

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}

Question 17
Which of the following statement(s) is/are true about the heart?

(i) Left atrium receives oxygenated blood from different parts of the body while right atrium receives deoxygenated blood from lungs.

(ii) Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs.

(iii) Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts.

(iv) Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body.

(a) (i)
(b) (ii)
(c) (ii) and (iv)
(d) (i) and (iii)

Question 20
In which of the following vertebrate group/groups, the heart does not pump oxygenated blood to different parts of the body?

(a) Pisces and amphibians
(b) Amphibians and reptiles
(c) Amphibians only
(d) Pisces only

Left atrium receives oxygenated blood from ______ .

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