Question

DEFINE-: Peristaltic movement, saliva, alveoli.

Answer 1

Peristalsis is the contraction and relaxation of the muscles of the digestive tract to move the food through the digestive system. It helps in proper digestion

Saliva is a watery substance formed in the mouths of animals, secreted by the salivary glands. Human saliva comprises 99.5% water, plus electrolytes, mucus, white blood cells, epithelial cells (from which DNA can be extracted), glycoproteins, enzymes (such as amylase and lipase), antimicrobial agents such as secretory IgA and lysozyme.[1] The enzymes found in saliva are essential in beginning the process of digestion of dietary starches and fats. These enzymes also play a role in breaking down food particles entrapped within dental crevices, thus protecting teeth from bacterial decay.

The alveoli are tiny air sacs within the lungs where the exchange of oxygen and carbon dioxidetakes place.

Answer 2

Peristaltic movement :-The movement where slowly push up of food from mouth to stomach is called Peristaltic movement..

Saliva:- the watery fluid present in our mouth secreted by saliva enzymes. Saliva contains amalayas that is salivary amalayas which breakdown starch into sugar.. Means complex substances into simple one...

Alveoli:- it's is balloon like structure present in lungs which provides a surface area for exchange of gases.. It contains large network of blood vessel..


Hope it helps u dear...