Although the Integument Is a Covering, It Is by No

Although the integument is a covering, it is by no means simple, and some of its functions include
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A) the dermis providing the major mechanical barrier to chemicals, water, and other external substances
B) epidermal blood vessels serving as a blood reservoir
C) cooling the body by increasing the action of sebaceous glands during high- temperature conditions
D) resident macrophage- like cells whose function is to ingest antigenic invaders and present them to the immune system