By: Alfredo Prado
Facts about sponges
Sponges belong to the phylum Porifera.
Some characteristics of sponges are that they are asymmetrical. Sponges do not have any tissue organization, they have Digestive openings called Pores. Sponges have no respiratory systems. They have no circulatory system, respiratory system, Excretory, or nervous systems. They have Osculums which is a type of body cavity.
Sponges benefit humans by scrubbing bathrooms,