The human body has 12 pairs of ribs, 24 in total, with pairs 1 to 7 being true ribs, pairs 8 to 12 being false ribs, and pairs 11 to 12 being floating ribs.
The ribs of the human body are composed of ribs and rib cartilage, with 12 pairs and 24 roots in total. They mainly play a role in maintaining the shape of the thorax and protecting the internal organs.
The first to seven pairs of ribs directly connected to the front of the sternum, known as the true ribs, the second to seven pairs of ribs and the front of the sternum constitute the thoracic rib joint. The 8th to 12th pairs of ribs are not directly connected to the sternum and are called false ribs, among which the 8th to 10th ribs are connected to the upper ribs through the costal cartilage to form the rib arch, and the 11th to 12th pairs of ribs are free at the end and are called floating ribs.