Their skin is covered with bumpy gills.
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.
The coelomic cavity in general holds organs in place.
abdominal cavity
Protists do not have a body cavity.
Pisces or fish have true internal body cavity.
A starfish has radial symmetry
a starfish is missing a few body parts like fins and tails
starfish have bumps and spines on their body
The body cavity of a frog is much larger in ratio to its body than a man's body cavity is. A frog's body cavity is also much more condensed than a man's.
thoracic cavity
thoracic and abdominopelvic cavity
The dorsal cavity.