Whereas pinacocytes line the outside of the sponge, choanocytes tend to line certain inner portions of the sponge body that surround the mesohyl. Why is movement of water through a sponge important for feeding How are choanocytes involved in this process? A damp sponge will absorb more water than a dry sponge as water molecules are highly attracted to one another. The holes between the sponge fibers absorb the water, and so the sponge material swells up with water. Why do sponges absorb the most water? Why do sponges absorb water? Sponges are made of loose fibers with lots of space between them. Many of these chemicals have been isolated and studied by scientists. Sponges also defend themselves by producing chemically active compounds. The pointed sponge spicules function as one method of defense against predators. How does a sponge hold water if it has holes?īelow are some things to consider when trying to figure out how do sponges use water to carry out essential functions.Īs sessile animals, sponges are vulnerable to a variety of predators.
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