The function of the integumentary system is primarily to absorb water. The integumentary system, which includes the skin, hair, nails, and associated glands, helps protect the body, regulate temperature, and provide sensory information, but it also plays a role in water absorption when it comes to skin health and moisture retention.
However, it's worth noting that while the integumentary system contributes to protection and can influence processes like healing (related to forming blood clots and growing new tissue), those functions can be considered secondary in the context of the integumentary system itself. The options of "forms blood clots" and "grows new tissue" are more aligned with other systems, particularly the circulatory and immune systems. Lastly, "breaks down chemical bonds in food" relates to the digestive system.
Therefore, the most fitting answer from your options would be absorbs water.