Question

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

Answer 1

Frog's heart:

1. The frog's heart is three-chambered and it has no partition that separates oxygenated and deoxygenated blood.
2. It has two main chambers namely - Sinus Venosus which receives blood and Conus Arteriosus which departs blood.

Human heart:

1. The human heart has four separate chambers.
2. Double circulation occurs where the blood enters the heart via the right auricle and it exits via the left ventricle.

Frog's heart	Human heart
It has a three-chambered heart. It has two auricles and one ventricle.	The human heart contains four chambers. It has two auricles and two ventricles.
Incomplete double circulation occurs in the frog's heart.	Well-defined double circulation occurs in the human heart.
Deoxygenated and oxygenated mix in the heart as there is only one ventricle present.	No mixing of blood happens as well defined chambers and septum are present.