Question

why the human digestive system is very complex in nature​

Answer 1

The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue, salivary glands, pancreas, liver, and gallbladder). Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body.

Answer 2

Answer: Humans have complex digestive system as per their dietary needs. Answer: ... Stress and digestion issues affect the immune system because stress makes it hard for our digestive tract to properly secrete enzymes such as protease, one of many enzymes for protein digestion.