Yes it does
Echinoderms also have a spacious coelom (an open, fluid-filled body cavity lined with tissue), large gonads, and (usually) a complete gut.
Animals with a body cavity lined with tissue from the mesoderm are known as coelomates. This type of body plan is found in more complex animals such as annelids, mollusks, arthropods, echinoderms, and chordates. Having a coelom allows for more complex organ systems and better body movement.
34759234875-134957
like a starfishes....
what aver
legs.
The brain and the spinal cavity are located in the dorsal body cavity.
Pisces or fish have true internal body cavity.
A cavity that houses body organs is called a body cavity. The main body cavities are the thoracic cavity, abdominal cavity, and pelvic cavity, which contain organs such as the heart, lungs, stomach, and intestines.
Echinoderms are a phylum with usually 5 fold symmetry, spines and calcium carbonate plates.
it is usually with 5 arms
The abdominal cavity is not part of the dorsal cavity. It is located in the ventral cavity, along with the thoracic and pelvic cavities.