Question

Pigeon’s heart has __ compartments.
a. 1
b. 2
c. 3
d. 4

Answer 1

Hint: The right ventricle’s job is to pump blood to the lungs, as the left ventricle pumps blood to the rest of the body. The right atrium was bigger than the left in pigeons.

Complete answer:
Animals fit into the class Aves have a 4-chambered heart i.e., it contains 2 atria & 2 ventricles. Like mammals, in birds, there is an entire separation of oxygenated and deoxygenated blood.

The right ventricle pumps blood to the lungs while the left ventricle pumps blood to the rest of the body parts.
And the pigeon belongs to the class Aves.

Hence, The correct answer is option (D). 4

Additional information:
> The heart is a muscular organ almost the size of a fist, located just at the rear and slightly left of the breastbone. The heart pumps blood through the system of arteries and veins called the cardiovascular system.

> The coronary arteries run beside the surface of the heart and supply oxygen-rich blood to the heart muscle. A mesh of nerve tissue also runs through the heart, conducting the multifaceted signals that govern contraction and relaxation. Surrounding the heart is a pod called the pericardium.

> The wall of the chambers of pigeon consists of similar muscle components like mammals have. The endocardium is found as the innermost lining, the middle myocardium, and the outer.

Note: The heart is situated in the cranial portion of the thoracoabdominal void with its long axis somewhat to the right. Radiographically, the liver lengthens caudally from the apex of the heart. This overlap leads to an hourglass look of the two organs.