What is contained within the thoracic cavity?

The thoracic cavity is an essential part of the body that houses vital organs important for respiratory and circulatory functions. Within this cavity, you will find the heart, which is crucial for pumping blood throughout the body, and the lungs, responsible for gas exchange, facilitating oxygen intake and carbon dioxide removal. Additionally, the esophagus, which is the tube that carries food from the mouth to the stomach, is present in the thoracic cavity, as well as the great vessels, including major arteries and veins that transport blood to and from the heart.

The other options refer to organs located in different body cavities. The brain and spinal cord reside within the cranial cavity and spinal canal, respectively; the liver and stomach are found in the abdominal cavity; and the kidneys and bladder are located in the pelvic cavity. Thus, option B accurately identifies the components found specifically in the thoracic cavity.