The skull is comprised of flat bones (occipital parietal frontal, nasal and lacrimal) and the thoracic cavity (sternum and spine) and the pelvis (ilium and Ischium). The flat bones shield internal organs like the brain, heart and pelvic organs. Flat bones can be flattened and provide protection, like the shield of a shield. Flat bones can also offer huge spaces of attachment for muscles.
The femur (the longest and most extensive bone in the body), as well as the relatively small bones found in the fingers, are the long bones. Long bones assist in supporting the body's weight and allow for mobility. Long bones are located primarily in the appendicular bone and comprise bones found in both lower limbs (the fibula, femur and fibula metatarsals or the phalanges), as well as bones in higher limbs (the radius, ulnas, metacarpals , or humerus).
Irregular bone shapes and structures are distinct, which is why they don't fit in any other classification (flats, shorts, longs, sesamoids, etc.). Because they're often complicated and shaped, they can help to protect internal organs. The spinal cord is protected by, for instance, the vertebrae. These are the irregular bones found in the vertebral columns. Click here The pelvic cavity is protected by irregular bone structure of the pelvis (pubis-ilium Click here and Ischium).
Sesamoidbones are bone fragments that are embedded in the tendons. Small, round bones can be found in the tendons on the feet, knees and hands. Sesamoid bones function to protect tendons from stress and wear. The sesamoid bone forms the patella, also known as the kneecap.
Overview
Although it is often seen as an inert support system, the skeletal structure is actually dynamic and performs many roles. This includes providing us with our human form, motor function, locomotion and protection of organs vital to us, production of tissues derived from the marrow, and playing a crucial role in homeostasis.
Bones are living structures that are in constant change and remodeling in response to the ever-changing world. The fact is that there is so much turnover in bones that within four years, the skeletons of children will be totally different from the skeleton they have now.