Why is heart beat more in animals with less weight ?

Question

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 more in animals with less weight ?

Answer 1

The time taken for circulation of blood from heart to body parts and body parts to heart is less. Therefore the rate heart beat is more in the animals with less weight.