Final answer:
The major body cavities are the dorsal and ventral cavities. The dorsal cavity houses the brain and spinal cord, while the ventral cavity contains organs such as the heart, lungs, stomach, and intestines. The serous membrane lines the walls of the body cavities and covers the organs to reduce friction and allow smooth movement.
Step-by-step explanation:
The dorsal cavity includes the cranial and spinal cavities. The ventral cavity includes the thoracic and abdominopelvic cavities. The dorsal cavity houses the brain and spinal cord, while the ventral cavity contains organs such as the heart, lungs, stomach, and intestines.
Three-Dimensional Relationships: The dorsal and ventral cavities are located on opposite sides of the body. The ventral cavity is located on the front side of the body, while the dorsal cavity is located on the back side of the body.
Serous Membrane: The serous membrane is a thin layer of tissue that lines the walls of the body cavities and covers the organs within these cavities. It helps reduce friction between organs and allows them to move smoothly.