Rib is the anatomical name for a bone, a small curved bone that is part of the flat bone, the name for the human skeleton, located in the thorax of the body. The rib cage is located on either side of the vertebrae of the trunk, and the posterior end of the rib cage is connected to the thoracic vertebrae, and the rib cage is an important part of the thorax. The rib morphology is generally slightly inflated at the posterior end of the rib head, with the rib neck thinning outward from the rib head and flattening outward into the rib body. The internal surface of the rib cage has a rib groove near the lower edge of the rib cage, through which blood vessels and nerves pass. At the posterior end of the rib, there is a small rib head that forms a joint with the rib concavity of the corresponding thoracic vertebra. The front end of the rib body is rough and connected to the rib cartilage, which is hyaline cartilage and is associated with the lateral margin of the sternum. There are 12 pairs of ribs on the left and right side. Only ribs 1 to 7 at the front of the sternum are connected to the sternum by rib cartilage and are called true ribs. The 8th-12th ribs are pseudoribs, where the 8th-10th ribs are connected to the cartilage of the previous rib by means of cartilage to form a rib arch. The front of the 11th-12th ribs are free in the muscle and are called floating ribs. The ribs, thoracic vertebrae and sternum are interconnected to form the thoracic cavity, which protects the heart, lungs, liver, and other important organs and helps strengthen the function of breathing. In short, the rib is a name for the human skeleton, is located on both sides of the thoracic vertebrae, is an important part of the composition of the thorax, playing a protective role.