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Handwritten answers on a biology worksheet about the skin's functions and protective mechanisms.

A close-up of a worksheet titled "Integumentary System (Skin)" from Chapter 4, featuring handwritten answers in red ink. The page includes questions about the skin's protective functions, with classifications of barriers (chemical, biological, mechanical), the impact of sunburn on immunity, the role of sweat glands in thermoregulation, and completion of statements about sensory receptors, vitamin D synthesis, and calcium metabolism.

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ID: #269411

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