Question

What is Double circulation?

Answer 1

Hint: The circulatory system transports nutrients and gases such as oxygen across the body, as well as metabolic waste products away from the body. The heart and lungs are critical for blood circulation and purification in the body.

Complete answer:
There are two types of circulatory systems in animals: open circulatory and closed circulatory. A double circulatory system is used by the majority of mammals, including humans. Depending on the amount of occasions blood circulates through the heart, the closed circulatory system is further divided into two types:
Single Circulation:
In a single circulatory system, blood travels from the heart to the gills, where it is purified before being circulated to various parts of the body. The term "single circulation" comes from the fact that only one cardiac cycle is completed. Birds, fish, reptiles, and other animals, for example, have single circulation.
Double Circulation:
The heart is the most important organ for blood circulation, and double circulation is a good way to circulate blood because it is effective. The key distinction is that blood travels in two directions: one for oxygenated blood and another for deoxygenated blood. As a result, the term "double circulation" was coined. A double circulatory system is used by the majority of mammals, including humans.
The human heart is divided into four chambers:
Left Atria
Right Atria
Left Ventricles
Right Ventricles
Furthermore, the pulmonary artery and vein bind the heart to the lungs. There are two pathways through which blood flows in double circulation. They are as follows:
Systemic circulation:
The left ventricles send oxygenated blood to the tissue capillaries via systemic circulation.
The oxygen-rich blood is transported to the aorta, where it circulates across the body.
Later, the veins and venules absorb the carbon dioxide-rich deoxygenated blood from different parts of the body.
Deoxygenated blood is returned to the superior vena cava and then to the right atrium.
The right atrium transports blood to the right ventricle for pulmonary circulation after receiving deoxygenated blood.
Pulmonary circulation:
Blood circulates from the right atrium to the left atrium in the pulmonary circulation. The pulmonary artery gathers blood from the right ventricle and transports it to the lungs for oxygenation.
Following the purification process, oxygenated blood is returned to the left atrium through the pulmonary vein, which then travels to the left ventricles.
The left ventricle is the heart's left chamber.
The oxygenated blood is pumped to the aorta for systemic circulation by the left ventricles.

Note:
Both oxygenated and deoxygenated blood are kept apart by double circulation. As a result, this circulation ensures that the body has a constant supply of oxygen while also increasing body function. One of the reasons mammals can regulate their body temperatures is because of this. A third portal system, in addition to the double circulation, exists to increase circulation performance.