Largest body size most sponges are in this form Folding increases surface area so that more food particals are collected Tend to be small because there is not folding Choanocytes are always on the inside and the pinococytes are always on the outside Body design is determined by the degrees of folding in the choanocyte layer Regulate water flow in charge of regulating how much water goes into the sponge.Contractile - they contract and relax to regulate water flow.flattened structure on the outside of the cell wall.Where A) food is digested or B) the eggs are fertilized Chanocytes capture food and sperm particals they are moved to the archeocyte.They can also transition into Pinacocytes [ Sclerocytes are cells that generate spicules which is the framework that holds the Can transition into scelerocytes or spongocytes.Secrete waste as their form of a digestive process.Mesohyl Layer: Matrix, gelatinous, non-livingĪrcheaocytes: Move around like amoeboids (aka using pseudopodia for movement) O Generate currents move the flagellum back and forth to generate a current Choanocyte Layer: The inside of the sponge that helps with water movement, capture Osculum- The opening on top where the water is pushed back out Ostium- where water comes into the sponge they are pores along the body wall Sponges are filter feeders so they continually pump water through their bodies to feed Largest and most diverse producers of metabolites Their cells are totipotent meaning that they can develop into any type of cell and No organs, no nerves, no digestive or circulatory system They are PARAZOANS meaning they lack true tissue O Sponges existed before the Cambrian explosion and used to dominate coral reefs No multicellular (this is what separates them from animals) Protozoans that can be single celled or colonial Porifera: No true tissue basal metazoan group
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |