Draw a diagram of human digestive system and name any three of its organs.
Answers
Answer:
heart ,lungs, brain
Explanation:
harat lungs brain
Answer:
Anatomically, the digestive system is formed from the alimentary canal which includes the mouth, stomach, esophagus, small intestine, and large intestine that contains the rectum and anus alongside accessory organs like the liver, pancreas, and gallbladder.
Explanation of the human digestive system are-
(i) Food is crushed and cut in the mouth with the help of teeth and is mixed with saliva that is secreted by three salivary glands (one below the tongue and two at the side of the jaw) to make it wet and slippery, this process is known as mastication.
(ii) Saliva contains amylase that breaks down complex carbohydrates and the tongue helps in pushing the food to the next part of the alimentary canal.
(iii) The soft food then passes through the oesophagus in a wave-like movement known as a peristaltic movement.
(iv) In the stomach, food mixes with gastric juices and dil. HCl. The food is broken down into simple substances with the help of digestive enzymes like pepsinogen, while mucus protects the walls of the stomach.
(v) From the stomach, the food moves into the small intestines with the help of ring-like muscles called pyloric sphincters which allow only a little food to