What are the two main body cavities?

internal organs and viscera.

Explanation:

The cavities, or spaces, of the body contain the internal organs, or viscera. The two main cavities are called the ventral and dorsal cavities. The ventral is the larger cavity and is subdivided into two parts (thoracic and abdominopelvic cavities) by the diaphragm, a dome-shaped respiratory muscle.

i hope this is correct! c:

that is correct.

pathogens is the answer