Orange Elephant Ear Sponge
Sponges are the only multicellular animals without a nervous system. They do not have any nerve cells or sensory cells. While they do not have nervous systems, a touch or pressure to the outside of a sponge will cause a local contraction of its body.
Sponges' bodies are made up of a non-living jelly-like mass sandwiched between two main layers of cells. Sponges have no nervous systems, their middle jelly-like layers have large and many different populations of cells, and some types of cells in their outer layers can move into the middle layer and change their functions.
Fun Fact- This sponge is often used for decorative
purposes in saltwater aquariums.
Sponges' bodies are made up of a non-living jelly-like mass sandwiched between two main layers of cells. Sponges have no nervous systems, their middle jelly-like layers have large and many different populations of cells, and some types of cells in their outer layers can move into the middle layer and change their functions.
Fun Fact- This sponge is often used for decorative
purposes in saltwater aquariums.