Question

How does a frog's heart differ from a human's heart?

Answer 1

Hint: Frog and Human both belong to phylum Chordata and subphylum Vertebrata but Frog belongs to class Amphibia whereas humans belong to class Mammalia.

Complete answer:
1)Frog also known as Rana tigrina has a closed circulatory system and they have incomplete double circulation.
2)The circulatory system contains Heart and blood vessels and the frog has a three-chambered heart whereas humans have a four-chambered heart.
3)Frogs have 2 auricles and 1 ventricle whereas humans have 2 auricles and 2 ventricles.
4)The right auricle in the frog receives impure deoxygenated blood from the entire body and the left auricle receives oxygenated blood from the lungs, when the blood from these two auricles reaches the ventricle they get mixed up in the ventricle because there is only one ventricle present in the heart of the frog, from where the blood is supplied to the entire body Hence the circulation in the frog is known as the incomplete double circulation.
5)Whereas in Humans there are 4 chambers in the heart where the left auricle receives oxygenated pure blood from the lungs and the right auricle receives impure deoxygenated blood from the entire body after which the deoxygenated blood flows from the right auricle to the right ventricle and the oxygenated blood flows from the left auricle to the left ventricle.
6)The heart rate of a frog is 64 times per minute whereas in a healthy human the heart rate is 72 times per minute.

Hence, the correct answer is option ()

Note: Frogs have contractile tubes known as blood vessels that are responsible for the distribution of blood from the heart to various parts of the body. Frogs have 3 types of blood cells that are RBC, WBC, and thrombocytes. RBCs are biconvex and nucleated whereas in humans the RBC are biconcave and non-nucleated.