Answer:
B Heart and lungs
Explanation:
The thoracic cavity is another term for the chest cavity. It is enclosed by the ribs, spine, and breast bone, and is separated from the abdomen by the diaphragm.
It contains the heart, lungs, and the esophagus, and the blood vessels that supply them.
A. Sickle cell anemia. The red blood cells in the hereditary disease sickle cell anemia have a characteristically shape of a sickle, a moon shape, rather than a normal disc shape.