What does the spinal cavity contain?

The spinal cavity, also known as the vertebral or spinal canal, is a protective structure that houses the spinal cord. The spinal cord is a vital part of the central nervous system, functioning as a major conduit for information traveling between the brain and the rest of the body. It relays sensory signals from the body to the brain and motor signals from the brain to the body, playing a crucial role in reflex actions and overall bodily function.

The other options represent organs that are housed in different cavities of the body. The heart and lungs are located in the thoracic cavity, the urinary bladder is found in the pelvic cavity, and the stomach and intestines are situated in the abdominal cavity. Thus, the correct answer focuses specifically on what is contained within the spinal cavity, confirming that it is the spinal cord that resides there.