1.

Look at the following table and answer the following questions.Name of the animalWeight of the bodyWeight of the heartNo. of beats / min.Blue whale1,50,000 kgs750 kgs7Elephant3,000 kgs12-21 kg46Man60-70 kgs300 grams76Coaltit Bird8 grams0.15 grams 1200(a) What is meant by Cardiac cycle ? (b) Write relation between the weight of the heart and heart beat.

Answer»

(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 beat decreases and if the heart weight is less and the rate of heart beat is more.



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