(a) What is meant by Cardiac cycle ? (b) Write relation between the weight of the heart and heart ****.

Question

Look at the following table and answer the following questions.

| Name of the animal | Weight of the body | Weight of the heart | No. of beats / min. |
| Blue whale | 1,50,000 kgs | 750 kgs | 7 |
| Elephant | 3,000 kgs | 12-21 kg | 46 |
| Man | 60-70 kgs | 300 grams | 76 |
| Coaltit Bird | 8 grams | 0.15 grams | 1200 |

(a) What is meant by Cardiac cycle ?

(b) Write relation between the weight of the heart and heart ****.

Answer 1

(a) One contraction and one relaxation of atria and ventricles is called one Cardiac cycle.

(b) If the heart weight increases the rate of heart decreases and if the heart weight is less and the rate of heart is more.