Essential nutrients refers to classes of nutrients found in food. Essential nutrients are simply those that are vital for the normal growth, maintenance and development of the body. There might be a slight confusion about essential nutrients that must be addressed.
Definition of waterproof for English Language Learners. : 1  designed to prevent water from entering or passing through. : 2  designed so that water alone will not remove it.
Skin - Intact skin is the first line of defense for the immune system. Skin waterproofs the body and is the major receptor for the sense of touch. 3 terms. cutane/o dermat/o derm/o. Sebaceous Glands - Secrete sebum oil to lubricate the skin and discourage the growth of bacteria on the skin. seb/o.