Our bones provide support for our bodies and give shape to our body. The function of the skull is to provide protection to brain and give shape to our face. the backbone, or spinal column protects spinal cord, a pathwaymessage between brain and body. heart, lungs, liver, and spleen, is provided shelter by ribcage. The pelvis protects bladder, intestines, and in women, the reproductive organs. Although they're very light, bones are strong enough to support our entire weight.

Two bones junction is called joint. Skeleton provide movement and flexibility to the body. Musceles also help in movement. The tough masses elastic tissue help in pulling the bones along with them when we move. Together, our bones, muscles, and joints - along with tendons, ligaments, and cartilage - form our musculoskeletal systems and enable us to do everyday physical activities.

What Are the Bones and What Do They Do?
The human skeleton has 206 bones. Bones form the shape of the embryo. The skeleton in the embryo stage of flexible cartilage, but within a few weeks it begins the process of ossification (pronounced: ah-suh-fuh-kay-shun). Ossification is the process of replacing the cartilage by hard deposits of calcium phophate,

The bones of kids and young teens contain growing zones called growth plates and are smaller than those of adults.These plates consist of columns of multiplying cartilage cells that grow in length, and then change into hard, mineralized bone. These growth plates can be spotted on an X-Ray machine. Growth plate in girls change into hard bone at an early stage than in boys as they mature at an early stage.

The body constantly renews and reshapes the bones' living tissue and throughout life bone building continues.
Bone contains three types of cells:

• osteoblasts (pronounced:
  ahs-tee-uh-blastz), they help form new bones and repair damaged tissues.

• osteocytes (pronounced: ahs-tee-o-sites)
  they carry nutrients and waste products to and from the blood vessels to bone,

• and osteoclasts (pronounced: ahs-tee-o-klasts)
  Kids and teens have highly active osteoclasts bones as they are remodeled during growth. Fractures are also repaired with the help of them.