The sponge lacks true tissue, has no body symmetry, and is stemless. Types are categorized based on the presence and composition of spicules.
Does the sponge contain true tissue?
Sponge and cnidaria represent the simplest animals. The sponge appears to represent the early stages of multicellularity in the animal clade. They have cells that are specialized for a particular function, but lack the true tissue in which specialized cells are organized into functional groups.
Does true tissue exist in sponges?
Unlike protozoa, sponges are multicellular. .. Therefore, the sponge lacks true tissue and organs. Moreover, they have no body symmetry. However, sponges have special cells that perform certain functions.
How many true panniculi do sponges have?
What are the three "layers" of the sponge? Why doesn't the sponge have a true panniculus? The sponge has three layers: epidermis, mesohyl cells, and choanocytes. The cells that make up the sponge do not adhere to each other to form tissue, so the sponge has no true tissue.
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