Final Answer:
Spine can be found in the dorsal cavity of the body. Option D is correct.
Step-by-step explanation:
The correct option found in the dorsal cavity of the body is the spine. The dorsal cavity encompasses the cranial cavity, which houses the brain, and the vertebral or spinal cavity, which protects the spinal cord. The spine, also known as the vertebral column or backbone, runs along the dorsal side of the body, providing structural support and protection for the spinal cord.
The dorsal cavity is one of the two main body cavities, positioned along the posterior (back) side of the body. It protects crucial components of the central nervous system, such as the spinal cord, which is housed within the vertebral or spinal cavity. This cavity is formed by the vertebrae, which are stacked bones that make up the backbone or spine.
Unlike the other options listed—heart, testes, and stomach—which are located in different cavities of the body (ventral and pelvic cavities for the heart, testes, and abdominal cavity for the stomach), the spine is the only structure from the given options that is situated within the dorsal cavity.
Therefore, Option D is the right answer.