Question

Heart of amphibians is
A. Three chambered
B. Two chambered
C. Four chambered
D. None of the above

Answer 1

Hint: Amphibians are vertebrates that require water, or a moist atmosphere to endure. The various animals belonging to this class are salamanders, toads, frogs, and newts. All can inhale and receive water by their very thin surface.

Complete Answer:
Let us examine the given options to find out the correct answer.

Option A: The heart of amphibians is three-chambered and is seen in frogs. They have one ventricle and two atria and deoxygenated and oxygenated blood gets mixed in the ventricle. Therefore, the body never gets fully oxygen-rich haemoglobin. Therefore, this is the correct option.

Option B: The hearts of fishes are two-chambered, they have only one ventricle and one atrium. In that regard, the fish heart follows the embryonic form of all other vertebral mammals. Therefore, this is an incorrect option.

Option C: Most reptiles have one ventricle and two atria. The only exceptions are the 23 existing varieties of crocodilians (alligators, caimans, crocodiles and gharials) who, like animals and birds, have four-chambered hearts with two ventricles and two atria. Therefore this is an incorrect answer.

Thus, option A is the correct answer.

Note: A heart with three chambers is perfect for the requirements of amphibians who can receive oxygen within their skin when wet. Amphibians also have particular skin glands that provide valuable proteins. Some transport oxygen, water, and carbon dioxide unless into or out of the mammal.