Why do only animals require a digestive system ?
Hi Raja,
Animals and plants both are multicellular organisms. There is division of labour in multicellular organisms. This means that different parts of animal body perform different functions. For example, in animals alimentary canal along with accessory glands forming digestive system is involved in digestion of food. Animals consume complex organic food which they need to digest in digestive system to get nutrients and expel out undigested food. On the other hands plants photosynthesize i.e., they prepare their own food in the form of glucose. Glucose is a simple sugar and does not require any complex organs to be broken down. Glucose is broken down in the plant cells through cellular respiration.
Hope this answer helps,
All the best!