Which are the two main body cavities?

The two main body cavities are the dorsal cavity and the ventral cavity. The dorsal cavity houses the central nervous system, which includes the brain and spinal cord, providing protection and support. On the other hand, the ventral cavity contains the thoracic cavity (which holds the lungs and heart) and the abdominopelvic cavity (which contains digestive organs, reproductive organs, and more).

Understanding the distinction between these cavities is essential, as they serve different functions and house different systems of the body. The dorsal cavity's primary role is to protect the nervous system, while the ventral cavity composes multiple smaller cavities that protect and contains vital organs for different systems, such as respiratory and digestive systems.