When a human being is born, the skeleton consists of more than 300 bones or cartilages. If the human is then adult, has the skeleton only about 206 to 214 bones (depending on the count, the number may vary slightly), which are half in the hands and feet. In the course of development, the bones partially grow together (for example skull, hand), become more stable and resilient, thus strengthening the human skeleton.
Tasks of the skeleton
The bones are connected by joints or joints and give the body form and support. The body thus maintains its stability and provides the muscles with the flexible framework for movement and activity. The second important function of the skeleton is the protection of internal organs. For example, the heart and lungs are safely in the ribcage.
In addition to these two central tasks, the bones also have another important task, namely the production of blood cells. The blood cells are formed in the bone marrow, a net-like, strongly perfused tissue, which fills the cavities inside the bone.
By the way ...
- Every human being has an individual skeleton - comparing the skeletons of people of different stature shows these clear differences. And the number of bones can also vary depending on how many smaller bones have grown together to larger ones.
- The smallest bone of the human being can be found in the ear. It is the stirrup in the inner ear, which together with the hammer and anvil is an important part of the auditory system.
- The longest and heaviest bone of the human bone system is the thigh. He is about 50 cm long in an adult human, which is 1.80 tall. The thighs are very sturdy because they have to carry the entire body weight - when we stand, run or jump.