i. The main steps of nutrition in humans are ingestion, digestion,
absorption, assimilation and egestion.
ii. The largest gland in the human body is liver.
iii. The stomach releases hydrochloric acid and digestive juices which act on food.
iv. The inner wall of the small intestine has many finger-like outgrowths called villi.
v. Amoeba digests its food in the food vacuole.
vi. We chew the food with the teeth and break it down mechanically into small pieces.
i. Digestion of starch starts in the stomach. False
ii. The tongue helps in mixing food with saliva. True
iii. The gall bladder temporarily stores bile. True
iv. The ruminants bring back swallowed grass into their mouth and chew it for some time. True
v. We chew the food with the teeth and break it down mechanically into small pieces. True
vi. Large intestine receives digested and absorbed food. False
Ans. Gall bladder
Ans. Stomach
Ans. Mouth
Ans. Fats are mainly digested in the small intestine.
Ans. Water from undigested food is absorbed in the body in large intestine.
Ans. The acid kills many bacteria that enter along with the juices to act.
Ans. The food is completely digested in the small intestine.
Ans. Faeces are formed in the human body in large intestine.
Ans. Salivary glands secrete saliva.
Ans. Absorption of food takes place in small intestine.
Ans. Bile is a digestive juice that is secreted by the liver.
Ans. Faeces are stored in rectum.
Ans. The carbohydrates get broken into simple sugars such as glucose.
Ans. Fatty acids and Glycerol
Ans. Amino acids
Ans. It may be caused by an infection, food poisoning or indigestion.
Ans. Liver is the largest gland in human body.
Ans. The process of taking food into the body is called ingestion.
Ans. We have different types of teeth: incisor, canine, premolar and molar.
Ans. The saliva breaks down the starch into sugars.
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