Human Anatomy and Physiology
Circulatory System

Describe why the circulation in humans is called double circulation?


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2009-09-24 13:21:28
2009-09-24 13:21:28

We know that same blood passes two times through the heart i.e. 1) blood from heart to the lungs and 2) lungs to the heart for circulation in body. That's why circulation of blood in human beings is called double circulation.


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In double circulation there is complete segregation of oxygenated and deoxygenated blood. Because of this the blood passes twice through the heart in one cycle of circulation hence the name double circulation. This is necessary for optimum oxygen utilization as humans are warm blooded animals and need extra energy to maintain their body temperature

mammals have double circulation which means that during one circulation blood passes twice through the heart. It is necessary because double circulation is important in humans because it keeps oxygenated and deoxygenated blood separate and moreover it circulate blood to organs efficiently.

double circulation means blood flows through the heart twice. first circulation is completed when deoxygenated blood is brought to heart and is further pumped to lung for oxygenation. the second circulation pathway is from lungs to heart and then back to the body. so double circulation is important as it helps in oxygenation of blood.

Systemic circulation and Pulmonary circulation

Mammalian heart including man is two pumps in one consisting of four chambers. Humans have an efficient double circuit circulation i.e., pulmonary and systemic.

When coronary circulation is prevented in humans the result is a heart attack. The function of the coronary circulation is to nourish tissues of the heart.

if they had one circulatory system the blood will no flow to the rest of the body, thus getting loss of blood and death

The grasshopper has four chambers in its heart just like humans. However the circulation is different and the chambers are called sinuses.

The double circulatory system of blood flow references two distinct and separate systems. This distinction is shared by most vertebrates to varying degrees to include amphibians, birds and mammals (including humans.)

The type of circulation liquid being carried out is bloos the person that gave this answer is Melissa Monique maldanaldo

Animals have a circulation that humans don't have

Pulmonary circulation flows between the heart and the lungs in order to oxygenate the blood. That freshly oxygenated blood returns to the heart and the systemic circulation will deliver that oxygen to the rest of the body tissues.

Coronary circulation is blood flow to the muscles of the heart. Without a working heart, the baby would die.

All cartilage, and the outer layers of the skin.

No, the heart and other organs do that as part of the usual circulation.

To allow circulation of the blood through the body. This allows us to keep warm.

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Double circulation allows for a pressure increase after gas exchange occurs. In single circulation, the blood goes from the heart to the gill capillaries. Since these are so thin the starting pressure must be low so the capillary membranes don't leak. This causes less perfusion of gases into the tissues after the blood leaves the gills. Evolution solved this problem through double circulation, which began with lungfish. They have a partially divided heart which seperates the pulmonary and systemic circuit, so after the blood is replenished with oxygen it comes back to the heart which gives it a second pump so it has a higher pressure when it reaches the body. Humans have a fully divided circulation. Unlike partially divided systems, in humans the blood doesnt mix in the heart and it doesnt require "shunting" from one side of the heart to the other like lungfish do. It goes from Right ventricle->pulmonary artery->to the lungs-> pulmonary vein-> left atrium-> left ventricle->systemic circulation-> right atrium etc. This means there is a higher pressure difference between the systemic and pulmonary circuits, therefore, better perfusion and blood flow in the body.

A heart attack due to the lack of oxygen in the muscles that pump blood

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