![]() ![]() Unlike other animals, they lack true tissues and organs, and have no body symmetry. Sponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce sperm cells. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes. Sponges do not have nervous, digestive or circulatory systems. Sponges have unspecialized cells that can transform into other types and that often migrate between the main cell layers and the mesohyl in the process. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges are animals of the phylum Porifera ( / p ɒ ˈ r ɪ f ər ə/ meaning “pore bearer”). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |