Chapter: 04. Human Digestive System
Check Point 1
Carbohydrates is the instant source of energy. Fats give more energy than the same amount of carbohydrates. Proteins are made up of smaller units called amino acids. Our body can produce vitamin D and K. Ingestion is the process of taking food into mouth. The body gets energy by the assimilation of absorbed nutrients. Check Point (Implicit after Oesophagus)
The teeth, which are in the front and used for biting, are incisors. The milk teeth are replaced by permanent set of teeth. Teeth are the hardest nonbony structures in our body. Tongue identifies tastes with the help of taste buds. The opening of oesophagus in pharynx is called gullet. No digestion occurs in oesophagus. Check Point (Implicit after Digestive Glands)
J-shaped muscular bag that churns the food into a fine paste. Finger-like projections of small intestine. The opening of rectum to the exterior of body. The longest part of alimentary canal. The glands that produce saliva. The largest gland in human body. Check Point 4
The acid secreted in stomach An enzyme contained in saliva The expelling of undigested food The end products after protein digestion The part of alimentary canal where water and salts are absorbed Digestive juice that emulsifies fats Check Point 5
Condition of body gaining extra weight due to overeating. A state of the body when it gets less than the required nutrients. Diet with all essential nutrients in right proportion. A. Multiple Choice Questions
This is a digestive gland 
Answers to textbook exercises