Question

Q.7 Write short notes on the following.

c. peristalsis
d. dental plaque​

Answer 1

A] peristalsis;-

Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. It starts in the esophagus where strong wave-like motions of the smooth muscle move balls of swallowed food to the stomach. ... The motion mixes and shifts the chyme back and forth

.

B]

A sticky film that coats teeth and contains bacteria.

If dental plaque isn't removed when it's soft, it hardens and becomes difficult to remove. Dental plaque can damage a tooth and lead to tooth decay or tooth loss.