Human ribs 12 pairs, symmetrical left and right, with the back end connected to the thoracic vertebrae, and the front end only connected to the sternum with the 1-7 rib by cartilage, which is called true rib; The 8- 12 rib is called a false rib, in which the 8- 10 rib is connected with the cartilage of the previous rib by costal cartilage to form a rib arch, and the front ends of the 1 1 2 ribs are free, which is also called a floating rib.

The 1 rib is short and curved, the head and neck are slightly lower than the body, and the rib body is flat, which can be divided into upper and lower sides and inner and outer edges. There are anterior scalene muscle nodules formed by the attachment of anterior scalene muscle at the inner edge of the upper surface, and there are shallow grooves at the front and back of the nodules, which are the impressions of subclavian vein and subclavian artery. There is no costal groove below, and the front end is directly combined with the sternum by costal cartilage.

Extended data

Infantile rib eversion

The baby's diaphragm is relatively straight, with almost no radian. When the baby lies flat, the baby's ribs will be significantly higher than the chest when viewed from the side. This is because when the baby's diaphragm has not yet developed a physiological bulge, and the organs in the baby's chest and abdomen gradually develop, the ribs will be pushed out, resulting in a slight eversion of the rib margin, which is a normal development process. The thinner the baby, the more obvious the phenomenon of rib valgus.

The rib valgus has nothing to do with calcium deficiency or other trace elements, so there is no need for extra calcium supplementation, let alone special treatment. Costal valgus is a stage in the development of infants, which is physiological. Generally, it will gradually disappear with the development and maturity of diaphragm, and usually it will recover by itself when it is about 3 years old, which has no effect on the growth and body shape of the baby.

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