The coelomic cavity in general holds organs in place.
The body cavity is a true coelom because it is lined by a layer of coelomic epithelium of mesodermal origin.
The coelomic fluid acts as a hydrostatic skeleton in some organisms, such as annelids. The pressure of the fluid is used to produce movement, such as burrowing. It is also important for osmoregulation and circulation.
This a defect, an infection and has no function.
Mucus helps to catch dirt and bacteria.
So that the starfish's surface does not get covered in encrusting organisms, such as planktons or parasites. This action keeps the starfish healthy and alive.
Peritoneum
The sponges are Acoelomates. That is they don't have coelom or body cavity.
The body cavity is a true coelom because it is lined by a layer of coelomic epithelium of mesodermal origin.
The body cavity in a starfish contains the circulatory system and the haemal system. The body cavity also helps starfish by distributing oxygen that has been distributed throughout the body, through the body.
Brittle stars have a complex coelomic system, consisting of a spacious coelomic cavity that accommodates their internal organs. This coelomic system aids in internal transport, support, and protection of organs.
coelom is a fluid filled cavity within the body between the epidermis and gut it is derived from mesoderm there are three types of coelomic cavity they are coelomemates psuedo coelomates and acoelomates
Their skin is covered with bumpy gills.
The function of the central disk on the starfish is to regrow an appendage if one is cut off. It is where the arms of the starfish originate.
The coelomic fluid acts as a hydrostatic skeleton in some organisms, such as annelids. The pressure of the fluid is used to produce movement, such as burrowing. It is also important for osmoregulation and circulation.
To poop.
The function of the ambulacral groove on a starfish is to open the shells of bivalves. It also hold the tubed feet of the starfish.
The function of the chest cavity is to support some internal organs. The lungs and the heart are located in the chest cavity which protects and supports them.