GROSS ANATOMY

Detailed explanation-1: -The cranial cavity is the superior portion of the dorsal cavity, as we can see highlighted in red and labeled by the star below. The cranial cavity is enclosed by the cranium or skull, and it houses the brain. The cranial cavity is filled with fluid called cerebrospinal fluid that helps protect and cushion the brain.

Detailed explanation-2: -The upper portion, or the cranial cavity, houses the brain, and the lower portion, or vertebral canal houses the spinal cord.

Detailed explanation-3: -The thoracic cavity is separated by the abdominopelvic cavity by a thin muscle called the ‘diaphragm’.