The number of bones in the human skeleton model - human specimen model

The number of bones in the human skeleton model - human specimen model

(Human Muscle Model) There are 206 adult bones in total, which are divided into four parts: skull, trunk, upper limb and lower limb. But children have more bones than adults. Because: There are 5 sacrums in children, and they become 1 when they grow up. Children have 4 to 5 coccyx, and one piece is also synthesized when they grow up. Children have 2 ilium, 2 ischium, and 2 pubic bones, which merge into 2 hip bones in adults. In this way, children have 11 to 12 more bones than adults, that is, 217 to 218 bones. Medical books say that a newborn baby has as many as 305 bones. However, some bones regenerate "auxiliary bones" or "sub-bones". For example, some people have "subbones" or "subbones" in each hand and wrist. For example, some people have 24 "sub-bones" and "sub-bones" in each hand and wrist, and 26 in each foot.

(Human Muscle Model) Occasionally, additional small bones grow in the knees, elbows, and spine of the body, but the additional bones are different for each person. If "melting bones" or "sub-bones" are included, there are far more than 206 bones in adults. But since these "extra bones" don't mean much, we just need to know that adults have 206 bones. Of course, saying that an adult has 206 bones is a "total" of human beings worldwide. There are differences among the population in this regard.

A sample survey conducted by Chinese scientists in 1985 showed that Chinese people have fewer bones than Europeans and Americans, and most people only have 204 bones. In Europe and America, the vast majority of people have 206 bones. This is because most Chinese people have 2 bones in the 5th phalanx of their feet, unlike Europeans and Americans who have 3 bones. 1 less per foot, so only 204. The Z-long bone in the human body is the femur, the thigh bone, which usually accounts for about 27% of the human body height, and the Z-long leg bone has been recorded as 75.9 cm. The stapes in the ear is the smallest bone in the human body. It is only 0.25 to 0.43 cm long. The weight of an adult bone is about 1/5 of the body weight, and the weight of a newborn baby's bone is only about 1/7 of the body weight. Many bones are healed together later. Such as the skull, and tailbone.

An adult's coccyx is only one piece, but a newborn can still have 24 pieces. In addition, because the halogen gates were not merged, the entire skull was counted as a dozen pieces, and although the adult skull was counted as a few pieces, the number had been reduced a lot. In addition, the bones of the newborn are all in the form of cartilage, and some of them do not ossify later, but maintain the state of cartilage. In this way, these bones disappear automatically. In addition, in order to protect the newborn, some parts of the human body grow a few more bones, and these bones are gradually absorbed later.