Yes. It's called a bowel movement and the cavity is the anus and large and small intestine.
There are several advantages to having a coelom, or body cavity. The organs are enclosed, there is independent movement of the body wall, there is more space for organs, and there is a storage area for sperm and eggs. It also has fluids that protect organs and provide nutrients.
cerebellum
it aids with movement
The most common way people receive AIDS is from having sexual intercourse with some already carrying AIDS in there body.
abdominal cavity
Protists do not have a body cavity.
Pisces or fish have true internal body cavity.
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.