What is Double Circulation Class 10

What is Double Circulation in Human Beings Why is it Necessary - Class 10

The Circulatory System

  • The circulatory system is the system of transportation in animals . 
  • It consists of your heart, blood, veins, and arteries. It carries blood to every part of the body. 
  • The circulatory system delivers nutrients and oxygen to every cell in the body.
  • It also transports waste products such as carbon dioxide.
  • Animals have a transport system that delivers nutrients and oxygen to every part of the body.
  • It also carries waste products such as carbon dioxide to organs from where they can be removed from the body.

Also Check – What is Double Circulation in Human Beings Why is it Necessary ?

Double Circulatory System

Double Circulatory System in humans
  • Humans and other mammals have a double circulatory system. This means that blood passes through the heart twice in one complete circuit.

First circuit 

  • The Heart pumps deoxygenated blood to the lungs.
  • Here the blood picks up oxygen before returning to the heart.

Second circuit

The heart pumps oxygenated blood at a higher pressure to the rest of the body, and deoxygenated blood returns to the heart.

Why is Blood Circulation in the Human Heart called Double Circulation ?

Double Circulatory System

In Human Beings Blood flows twice in the Heart before it completes one full round that’s why it is called as Double Circulation.

The Two Cycles of Double Circulation are 

  • The Short Pulmonary (Lung) Circulation and 
  • The Long Systemic (General Body) Circulation. 

For this reason the blood circulation in the human body is called Double Circulation.

The Short Pulmonary (Lung) Circulation

  • The pulmonary circulation pertains to the lungs. 
  • It starts in the pulmonary artery arising from the right ventricle which soon divides into two branches that enter the respective lungs. 
  • Pulmonary veins collect the oxygenated blood from the lungs and carry it back to the left auricle of the heart.

The Long Systemic (General Body) Circulation

  • The systemic circulation pertains to the major circulation in the body. 
  • It starts with the aorta that arises from the left ventricle. 
  • The aorta arches back and continues behind as the dorsal aorta.
  • The aorta sends blood through arteries to various body parts and their tissues.
  • From there the blood is collected by veins and poured back into the heart.

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