The ribs are located on either side of the vertebrae of the trunk, and the posterior ends of the ribs are connected to the thoracic vertebrae. The ribs can be divided into three parts: the anterior and posterior ends and the body. The shape of the ribs is generally slightly expanded at the posterior end of the head of the rib, from the head of the rib to the posterior outward thinning is the neck of the rib, the external flattening into the rib body. The internal surface of the rib has a rib groove near the lower edge of the rib, and blood vessels and nerves pass through the rib groove. The posterior end of the rib has a costal tubercle that forms a joint with the rib recess of the corresponding thoracic vertebra. The true ribs are the anterior part of the 1st-7th pairs of ribs that are directly connected to the sternum. The 1st pair of ribs is cartilaginous and attached to the sternal stalk. The 2nd through 7th pairs of ribs are thoracic rib joints that form a micromotor joint with the sternum. Pseudoribs are the 8th-10th pairs of ribs that are not directly connected to the sternum. The anterior ends of the ribs are connected to the superior costal cartilages through cartilaginous links, forming a rib arch. The 11th and 12th ribs are free at the front and are called floating ribs. If you feel unwell, it is advisable to seek medical attention to avoid delay.