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How many bones are their in the body and are divided into how many groups
206 bones and two groups, axial and appendicular
axial skeleton
The central axis of the body that protects the vital organs

Appendicular skeleton
The bones of the limbs and their girdles that attach to the main axial skeleton. function is too facilitate body movement and locomotion.

Bones are classified in what shapes ?
long, irregular, short, and flat
long bones
A long bone has cylindrical bones featuring a central hollow cavity and two expanded ends , compromising all limbs except the kneecap, ankles and wrist.

Short bones (as well as sesamoid bones)
roughly cubed shapes, for example the bones and wrist

sesamoid bones
small, rounded bones embedded within tendons where they pass over joints. some act to alter the direction pull of a tendon. Others reduce friction and modify pressure on tendons to reduce abrasion or tearing.
Flat bone
Thin, flattened and usually a bit curved. the sternum, ribs and most cranial bones are flat bones

Irregular bones
complicated shapes that fit none of the preceding classes. for example the vertebrae and hip bones.
