Question

why do animals only required the digestive system and not on and not the other organisms why do only animals required the digestive system and not the other organisms

Answer 1

Hey......
Animals required digestive system because in which form animal takes food body cannt utilize it in direct way and take nutrition...
And other organisms like microorganisms , they don't have digestive system because their body are too small and their body can utilize their food in directly way and they can excreate their waste material through their body surface....
For example amoeba has food vacuole that helps in digestion......
I hope this will help u..