Observe the table given below and answer the questions.
Name of the animal |
Weight of the body |
Weight of the heart |
Heart beat per minute |
Blue whale |
1,50,000 kgs |
750 kgs |
7 |
Elephant |
3,000 kgs |
12-21 kgs |
46 |
Man |
60 – 70 kgs |
300 grams |
76 |
Koaltit |
8 grams |
0.15 grams |
1200 |
Why is heart beat less in animals with more weight ?