Read the following statements w.r.t. heart and circulatory system :
(i) Birds, mammals and crocodiles have a four chambered heart
(ii) In amphibians and reptiles the left atrium receives deoxygenated blood
(iii) Annelids have an open circulatory system
(iv) In amphibians oxygenated and deoxygenated blood may get mixed in the ventricle but usually do not mix
(v) Closed circulatory system is more advantageous than open one as the flow of fluid can be more precisely regulated
Which of the above statements are correct ?

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(ii), (iii)

(i), (ii), (iii)

(iii), (iv), (v)

(i), (v)

answer is C.

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Detailed Solution

(i) Birds, mammals and crocodiles possess a four chambered heart.

(ii) In amphibians and reptiles, the left atrium receives oxygenated blood.

(iii) Annelids have a closed circulatory system.

(iv) In amphibians, oxygenated and deoxygenated blood get mixed up in the single ventricle and pumps out mixed blood (incomplete double circulation).

(v) Closed circulatory system is advantageous than open one as the flow of fluid can be more precisely regulated.

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