There are 12 pairs of ribs and costal cartilages in a human being, totaling 24 ribs and costal cartilages, which serve to protect the heart and other organs of the thoracic cavity. The ribs and costal cartilages together form the ribs, and there are 12 pairs, of which the 1st to 7th ribs are directly connected to the sternum and are called true ribs. The first rib is cartilaginous between the first rib and the sternal stem. The 2nd to 7th ribs and the sternum form a micromobile sternocostal joint. The 8th to 10th ribs are not directly attached to the sternum and are called false ribs. The anterior ends of the ribs are attached to the superior costal cartilage with the aid of cartilage to form a rib arch. The anterior ends of the 11th and 12th ribs are free from the muscle layer of the abdominal wall and are called floating ribs. Together with the sternum, the ribs form the thorax, which protects the heart, lungs, and other important thoracic organs. If you feel unwell, it is recommended to seek medical attention and treatment.