First we enter the body by being miniaturized and we will enter as given a shot into the tibia. Now that we are inside the bone we will look at how the bone is built, and made up of. Bones are very strong. They are compared to concrete, or cast iron. Some bones can withstand pressure of 220kg pscm. About 45% of the material of a bone are nonliving. The minerals are usually calcium and phosphorus; they give the bone strength. Living cells & blood make up 30% and 25% water. Bones have three layers. The first is a thin covering of cells that form a tough protective membrane are the bone. A membrane called the periosteum surrounds individual bones. The second layer is a hard, white, rocklike mineral. The last layer of the bone is the marrow. It is lighter than the other materials. Although all bones don't have the same three layer setup. Short bones and many flat bones are mostly sponge, surrounded by a thin layer of hard bone. As children gr

ransformation with their bones called ossification. When this processes happens the cartilage turns to bone.

rgely on the child's age when the vitamin-D deficiency occurs. A child who has not yet learned to walk develops vertebral curvatures, and a walking child develops leg curvatures. Well we better end our tour here, the group member that feel fractured his leg, and he needs to reset it and eat healthy.

Next we hike up the steep yet very hard bone. As we go up the bone to get to the femur we must go over a hinge joint. A hinge joint is one of four of the major joints. The hinge joint allows only a back and forth movement, it is like a door hinge. Some examples of hinge joints are elbows and knees. Another type of joint is the ball & socket joint. This joint allows movement in nearly all directions. It gets its name because the ball like end of one bone fits into the socket like end of another bone. Some examples of the ball and socket joint are your hips and shoulders. The next joint that we observe is the pivot joint. This joint allows a rotating or rolling motion. The two top vertebrae form this type of joint, which allows you to roll and rotate your head. The last major joint is the gliding joint. This joint allows the bones to slide forward, backward and sideways. The two examples for this joint are the wrists and ankles.

I hope you enjoyed the tour of the skeletal system. And I hope you come back soon, remember the skeletal system is the best system in the human body.

Some common words found in the essay are:
Travel Systems, skeletal system, joint allows, hinge joint, joint joint, joint joint allows, axial skeleton, ball socket joint, trip skeletal system, skeletal deformities, bone bone, ball socket, socket joint, type joint,
Approximate Word count = 1018
Approximate Pages = 4 (250 words per page double spaced)