Bones are very hard whitish organs that unite with others through the joints or joints make up the Skeleton. It is a specialized form of connective tissue whose main feature is the mineralization (calcium) of its bone matrix (collagen and proteoglycan fibers). There are several types of bones, of which flat bones are described below.
Flat bones are thin bones and consist of two parallel blades of compact bone tissue, with a layer of cancellous bone between them. Flat bones provide considerable protection and generate large areas for muscle insertion. These are the bones most likely due to muscle fixation in the legs.
<span>Alveoli are specifically designed to quickly facilitate the exchange of gas from the lungs to the blood. They are very small, but with a very high surface area allowing a greater amount of gases to be exchanged in a comparatively short period of time.</span>
