Question

Amphibian heart is
A. Four chambered
B. Three chambered
C. Two chambered
D. One chambered

Answer 1

Hint: The animals that belong to the class amphibia are known as amphibians. They can live on land (terrestrial) as well as in water (aquatic). Therefore, for respiration they have gills, lungs or through skin. The amphibian heart comprises one ventricle and two auricles.

Complete step by step answer: Heart belongs to the circulatory system. The heart is a muscular chambered heart with a network of blood vessels. The heart pumps the blood throughout the body.
Vertebrata or other animals that have a backbone are divided into different classes such as fish, amphibia, reptile, Mammalia, etc. The heart of the vertebrates helps in the pumping of blood throughout the body. The heart of these classes of vertebrates possesses a different number of the chamber. These chambered helps in separating the oxygenated-blood with deoxygenated-blood and also determines the flow of blood. The characterization of the vertebrate heart is based on the number of chambers they have -
Two chambered heart - one ventricle and one atrium, for example, sawfish, Trygon
Three chambered hearts- one ventricle and two atria, for example, reptiles and amphibians. But there is one exception that is crocodiles. They have a four-chambered heart.
Four chambered hearts - two ventricles and two atria, for example, mammals and birds.
Hence from the above discussion, the correct option is B, i.e. three-chambered.

Note: Amphibians have a low metabolism, therefore the oxygen demand is also less. Less oxygen means putting less demand on the heart to deliver the oxygenated-blood. So the three-chambered heart is ideal for the amphibians. They also get oxygen from their moist skin.