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Question
Which of the following vertebrates were the first to evolve a three chambered heart so that every cell of the body receives proper amount of oxygen?
Which of the following vertebrates were the first to evolve a three chambered heart so that every cell of the body receives proper amount of oxygen?
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Solution
The correct option is D Amphibians
Fishes have two chambered heart while birds and mammals have four chambered heart. Amphibian and reptiles have three chambered heart but amphibians were first to develop the three chambered heart as an adaptation to land habitat. The amphibian heart is three chambered having two and a single ventricle. The systemic circulation passes blood to the various tissues and organs of the body. Then, via the heart, it is directed through the pulmonary circulation to the lungs and skin for oxygenation. Most reptiles have a more efficient three-chambered heart with single ventricle having an incomplete partition to separate oxygen-rich and oxygen-poor blood, facilitating oxygenation of the body tissue. Therefore, the correct answer is option C.
Fishes have two chambered heart while birds and mammals have four chambered heart. Amphibian and reptiles have three chambered heart but amphibians were first to develop the three chambered heart as an adaptation to land habitat. The amphibian heart is three chambered having two and a single ventricle. The systemic circulation passes blood to the various tissues and organs of the body. Then, via the heart, it is directed through the pulmonary circulation to the lungs and skin for oxygenation. Most reptiles have a more efficient three-chambered heart with single ventricle having an incomplete partition to separate oxygen-rich and oxygen-poor blood, facilitating oxygenation of the body tissue.
Therefore, the correct answer is option C.
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