Answer:
Thoracic cavity is not part of the dorsal cavity. Correct option is A.
Explanation:
Dorsal cavity is the cavity that is located at the posterior part of the human body. It is divided into two sub cavities:
- the cranial cavity: this cavity protects the brain .
- The spinal cavity ( also called vertebral cavity) : this protects the spinal cord.
The Thoracic cavity is part of the ventral body cavity which is located at the anterior part of the human body. I hope this helps. Thanks.