Biology, asked by profulalilac, 8 months ago

how do small birds like hummingbird and shrewhave large surface area ?​

Answers

Answered by sanjayjain2351
0

Explanation:

Functioning of Heart

1. Impure blood from the body enters the right auricle through inferior & superior vena cava

2. From the auricle the blood is pumped into right ventricle passing through tricuspid valve

3. Now the ventricle contracts and pump blood into pulmonary artery.

4. The pulmonary artery bifurcates and branches into each lungs

5. In the lungs the blood gets oxygenated and is collected by pulmonary vein.

6. Pulmonary vein carries blood to the left auricle.

7. The left auricle contracts to pump blood into left ventricle through bicuspid valve.

8. From the left ventricle the pure blood is pumped into aorta, which carries it to various parts.

Pulmonary and Systemic Circulation

Pulmonary Circulation: It deals with the purification of deoxygenated blood. It involves pumping of

impure blood from right ventricle to lungs, through pulmonary artery and returning of pure blood

from lungs to left auricle through pulmonary vein.

Systemic Circulation: It deals with the supply of pure blood to all the parts of body ,it includes the

pumping of pure blood from left ventricle to all parts of body through aorta ,and return of impure

blood from all the parts of body to right auricle ,through superior & inferior vena cava.

Double Circulation: A circulatory system in which the blood travels twice through the heart in one

complete cycle of the body is called double circulation. It includes both pulmonary and systemic

circulation.

Answered by amsmount
0

Answer:

Firstly I am a girl don't call me your brother and I have only asked to mark me brainliest not ask for a lollipop

Explanation: hope it clears your missunderstanding

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