Biology 202 Chapter 33.1 Sponges are basal animals that lack true tissues

an aquatic animal, such as a sponge, clam or baleen whale, that feeds by sifting small food particles from the water

the central cavity of a sponge

a large opening in a sponge that connects the spongocoel to the environment

a flagellated feeding cell found in sponges; also called a collar cell, it has a collar-like ring that traps food particles around the base of its flagellum

a gelatinous region between the two layers of cells of a sponge

an amoeba-like cell that moves by pseudopodia and is found in most animals; depending on the species, it may digest and distribute food, dispose of wastes, form skeletal fibers, fight infections, and change into other cell types

an individual that functions as both male and female in sexual reproduction by producing both sperm and eggs