It does actually become a body cavity, it becomes the digestive tract; the tube that passes through the body from mouth to anus.
The ventral cavity of the body arises during development from a space called the coelom. The coelom is a fluid-filled cavity that forms between the mesoderm during embryonic development. It eventually gives rise to the thoracic and abdominopelvic cavities in the adult body.
The coelom is called a secondary body cavity because it forms from splits within the mesoderm, rather than being a direct outgrowth of the embryonic gut like the primary body cavity, the archenteron. This development of the coelom occurs in more complex animals like vertebrates, while simpler animals may lack a true coelom or have a simpler body cavity arrangement.
The ventral cavity that develops in the embryo is called the coelom. It is a fluid-filled cavity that forms during early embryonic development and gives rise to the body cavities in higher organisms. The coelom helps provide space for organ development and movement.
The brain and the spinal cavity are located in the dorsal body cavity.
The coelom is a fluid-filled body cavity between the intestines and the body wall of some higher metazoans. It is lined with a mesodermal epithelium. The coelom is formed within the mesoderm of the embryo.
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.
The abdominal cavity is not part of the dorsal cavity. It is located in the ventral cavity, along with the thoracic and pelvic cavities.
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.
abdominal cavity
thoracic and abdominopelvic cavity
abdominal cavity