(b)
7. (a) Why is nutrition necessary for the human body?
What causes movement of food inside the alimentary canal ?
(cy Why is small intestine in herbivores longer than in carnivores ?
(d)
What will happen if mucus is not secreted by the gastric glands?
Answers
Answer:
(a) A healthy diet throughout life promotes healthy pregnancy outcomes, supports normal growth, development and ageing, helps to maintain a healthy body weight, and reduces the risk of chronic disease leading to overall health and well-being.
(b) Peristalsis Is the Contraction of Muscle Tissue That Helps Move and Break Down Foodstuffs. The walls of the alimentary canal include layers of smooth muscle controlled by the autonomic nervous system. Alternating contraction and relaxation of these muscles is called peristalsis.
(c) The small intestine is longer in herbivore than in carnivore because herbivores eat only grass which is full of cellulose and the digestion of cellulose takes a long time. ... Herbivores need a longer small intestine to allow cellulose to be digested as taken from green plants.
(d) Gastric glands in stomach release hydrochloric acid, enzyme pepsin and mucus. The mucus protects the inner lining of the stomach from the action of hydrochloric acid and enzyme pepsin. If mucus is not released, it will lead to erosion of inner lining of stomach, which may cause acidity and ulcer. Ultimately, mucus provides a protection against acids and enzymes in the stomach.
Answer:
a)nutrition is necessary for growth,development and repair of tissues in an organism
b)the movement of food is caused by peristalisis.peristalisis are the waves of contraction and relaxation of smooth muscle
c)herbivores consume food containing cellulose.cellulose takes more time get digested hence herbivores have longer intestine
d)mucus is a protective layer in stomach.it prevents the HCl acid from damaging the stomach wall.if it is not secreted,it will corrode the wall of stomach
hope this helps......if yes pls make me brainliest and pls follow me