Final answer:
The integumentary system's functions include protection, infection resistance, water retention, and Vitamin D synthesis.
Explanation:
Out of the given options, the function that is NOT a function of the integument is Filtration of light.
The integumentary system primarily functions in protection, infection resistance, water retention, and Vitamin D synthesis.
For example, the epidermis plays a crucial role in preventing water loss, protecting against pathogens and UV light, and synthesizing Vitamin D when exposed to sunlight.
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