There are 206 normal adult bones, but it is not possible to generalize; the number of bones is higher in children and at birth. There are 206 bones in a normal adult, and these bones can be divided into 3 main parts: skull, trunk and limb bones, of which there are 29 bones in the skull, 51 bones in the trunk and 126 bones in the limbs. In childhood, the bones should actually be 217 to 218, in childhood, the sacrum has 5, the coccyx has 4 to 5, in adulthood, the sacrum and coccyx will be fused into one, children have 2 sciatic bones, 2 pubic bone and 2 iliac bones, in adulthood, the merger of the 2 hip bones, in the newborn baby, the number of bones can be up to 305 as many. Bones in the human body have many functions, including support, protection, movement, metabolism and hematopoiesis. If you suspect any abnormalities in your bones, please consult a doctor in time to avoid delays.