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Question
Differentiate between.
Mechanical digestion and Chemical digestion
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Solution
Mechanical digestion:
1. In mechanical digestion, the ingested food is broken down in the mouth by chewing it.
2. Teeth help in mechanical digestion
3. Food is not completely digested in it.
Chemical digestion:
1. In chemical digestion, the food is digested by the action of enzymes.
2. Enzymes are involved in chemical digestion.
3. Proper digestion of food occurs in it.
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RELATED QUESTIONS
Which of the organs perform the functions in humans Absorption of food?
In human digestive system, the enzymes pepsin and trypsin are secreted respectively by:
(a) pancreas and liver
(b) stomach and salivary glands
(c) pancreas and gall bladder
(d) stomach and pancreas
The partially digested food coming from the stomach of a person enters a long and narrow organ A in his body. The organ A receives the secretion of two glands : liver and pancreas. Liver secretes a greenish-yellow liquid B which is normally stored in the organ C. Pancreas secretes pancreatic juice which contains three digestive enzymes D, E and F. The intestinal juice completes the process of digestion of food. The inner wall of organ A has millions of tiny finger-like projections G which help in the rapid absorption of digested food into blood stream. The undigested part of food then passes into wider tube H which absorbs most of the water from undigested food. The last part of tube H called I stores this undigested food (or waste) for some time. The undigested food is then passed out though opening J as faeces in the process known as K.
(a) Name the organ A.
(b) Name (i) liquid B, and (ii) organ C.
(c) What are the digestive enzymes D, E and F?
(d) Name the projections G present on the inner wall of organ A.
(e) Name (i) tube H (ii) part I (iii) opening J, and (iv) process K.
Define the following term:
Peristalsis
Write the function of the following in the human alimentary canal:
Villi
Define with examples: Carnivores
Correct the spellings: Reninne
Correct the spellings: Disegion
Choose the odd one:
List the glands associated with digestion.
