The crest is connected to the intra-articular ligament that combines the rib to the vertebrae of the same number, at the intervertebral disc. These articulate with the superior and inferior costal facets attached to the vertebrae. The top of the rib has a superior and an inferior articulating region, detached by a crest. ![]() ![]() The ribs joined to the vertebrae with two costovertebral joints, on the head and one on the neck. The top of the rib lies next to a vertebra. Human ribs are connected to the vertebrae at the costovertebral joints.The rib includes the head, neck, body, tubercle, and angle. At the front of the human body, most of the ribs are connected by costal cartilage to the sternum. The thoracic vertebra is attached to the first rib. All are connected at the back to the thoracic vertebrae and are numbered from 1-12. 1 in 500 people has an extra rib called a cervical rib. Human ribs generally have 24 ribs, in 12 pairs. Ribs are flat bones that form part of the rib cage to serve internal organs. ![]() There is a chance that 1 in 500 people have an extra rib called a cervical rib. They protect the thoracic internal organs. The ribs include 24 bones in 12 pairs which form the protective cage of the thorax. Ribs help to protect the lungs, heart, and other internal organs of the thorax. In most tetrapods, ribs cover the chest, allow the lungs to expand, and thus facilitate breathing by expanding the chest cavity. Invertebrate anatomy, human ribs are part of the axial skeleton, are the long curved bones that shape the rib cage.
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