The diaphragm.
into the thoracis and abdominopelvic cavity.
Yes, the mediastinum is a partition in the thoracic cavity that separates the lungs into right and left cavities. It does not divide the ventral body cavity. The ventral body cavity is divided by the diaphragm into the thoracic and abdominopelvic cavities.
Your question is not clear, but the diaphragm is the muscle that divided the abdomen from the thorax (the chest cavity from the abdominal cavity). Ventral is term that is used mostly in veterinary medicine and it refers to the side of the body that has the belly button.
The diaphragm divides the body into two main cavities: the thoracic cavity above the diaphragm, which contains the heart and lungs, and the abdominal cavity below the diaphragm, which houses the digestive organs such as the stomach, liver, 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.
NAME THE VENTRAL CAVITY THAT HAS NO BBONY PROTECTION
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 ventral cavity is anterior to the dorsal cavity which is in the posterior.
ventral cavity
(Ventral) Thoracic cavity
That is called the diaphragm.
The body membranes in the ventral cavity include the pericardium (around the heart), pleura (around the lungs), and peritoneum (lining the abdominal cavity and covering the abdominal organs). These membranes provide protection and support to the organs within the ventral cavity.