Does magma consist only of rock forming materials ? explain

Magma is melted earth that heats up from the pressure of other rock building up underneath it. As it builds up more and more the magma gets hotter and hotter. When the volcano erupts the magma is introduced to the different air temperatures and force between in the earth and out of it. When it flows down the volcano it cools down and turns back to its original form of rock.

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.