Science, asked by ankit6468, 5 months ago

Q.8 How origin of heartbeat takes place in human heart? Name the group of animals with

double circulation. How is it important? (3 Marks​

Answers

Answered by AnuRashuVerma
1

Answer:

By deoxygeneted and oxygenated blood when arteries carries blood heart to lungs it's deoxygeneted and when veins carries blood lungs to heart it's provide oxygenated blood so like this heart beat start.. And when we sneez it stop for a second..

Explanation:

Hope it will help you

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