Bones installation

Each long bone of a high long part called body bone and two ends roundtables Tkonan bone head consists. The surface covered with bone solid membrane called periosteum, contains a large number of tiny blood vessels gain pink color, because the bones like any tissue in the body must be fed with blood. There under the skin around the bone, the bone shard of steel ivory-like growing thick in the middle of the bone. And bone inside the crust spongy structure, and there are red marrow in Vjuath. Most of this spongy bone and is located at the ends of the bone. It consists of millions of red blood balls every second in this red bone marrow. For the football blood red nucleus inside the bone, so that is divided and breed can, thus passing the red ball in several phases as they grow, and once you are in a valid state to join other red balls that are in circulation, we see that the nucleus disappear from the middle, and here we see the ball red blood You can not divide a circulatory, nor reproduce, it may do so only a bone marrow inside the bones and the middle part of the bone hollow, and has a different kind of bone type, as is the greasy yellow color, it serves as a store of lipids in bone. The bones vehicle so that grow with the growth of the body, when the end of the body at both ends of the bones are as follows Roisseha, there is a thin layer of tissue called cartilage growth layer. This mounting body bone growth and allows without being influenced by her head at the same time the head of the bone grows without being influenced by his body. When Taatkls layer growth, bone growth stops.

Bones may not be moving on its own and where two bones meet each joint consists relate to some of the bones in different ways in order to be a solid body structure and is available to him at the same time a large-scale free movement. In the other, as in the elbows and knees relate to each bone with some hinge fluke or buttons In others, such as hinged crest and shoulder related bone hinge spherical Tjoavi In these two types of joints, and joints that Chbhama there is a layer of thin membrane secretes a liquid allowed to plunge the ends of the bones each other over some smoothly and without friction.

Some bones and some of them relate to some solid contact does not allow any movement, as in the bones of the skull, so these joints called Balthabth or non-animated. Valuge and head Atkonan example of the 

greatness of twenty-two (without auditory ossicles) does not move them, but the lower jaw.