Question

What is Double Circulation?​

Answer 1

double circulation

the type of circulatory system that occurs in mammals ,in which the blood passes through the heart twice before completing a full cycle .

• blood is pumped from heart to the lungs and return to the heart before being distributed to other organs ..

⏩ I hope it help you ❤️

Answer 2

ANNYEONGHASEYA MATE!!

Double Circulation

• The heart is the key organ for blood circulation and the double circulation is an efficient way of circulation as it provides an effective way of circulation.
• The main difference is that the blood follows two routes – one for oxygenated blood and the other for deoxygenated blood.
• Hence the name “double circulation.”
• The majority of mammals, including humans utilize double circulatory system.
• The human heart is divided into four chambers:

→Left Atria

→Right Atria

→Left Ventricles

→Right Ventricles

• Further, the heart is connected to the lungs through the pulmonary artery and vein.
• In double circulation, there are two pathways in which the blood flows. They are:  

Systemic circulation

• In the systemic circulation, the blood circulation starts from the left atrium of the heart to the left ventricle of the heart. In this pathway:
• The oxygen-rich blood is transferred to the aorta for circulating into various parts of the body.
• Later, the veins and venules collect the deoxygenated blood – which is rich in carbon dioxide from various parts of the body.
• The deoxygenated blood is pumped back into the superior vena cava and then to the right atrium.
• Once after receiving the deoxygenated blood, the right atrium carries blood to the right ventricle for pulmonary circulation.

Pulmonary circulation

• In the pulmonary circulation, the blood circulation starts from the right atrium to the left atrium. In this pathway:
• The pulmonary artery collects the blood from the right ventricle and carries to lungs for oxygenation.
• Once after the purification process, the oxygenated blood is pumped back to the left atrium through the pulmonary vein which is carried to the left ventricles.
• The left ventricles pump the oxygenated blood to the aorta for systemic circulation.
• Double circulation supports a strict separation of both oxygenated and deoxygenated blood. Therefore, this circulation ensures that the body always has a dedicated supply of oxygen and also, it improves the body efficiency. This is also one of the reasons why mammals can maintain their body temperatures.  Apart from the double circulation, a third portal system also exists to improve the circulation efficiency.