SKELETAL SYSTEM

Bone

________ is an active tissue that, while being around 22 percent water, has a structure that is incredibly robust while also being remarkably lightweight and flexible.

periosteum

The ________, which is a membrane that covers the surface of the bone, is connected to the marrow cavity by a network of small canals.

skeleton

The ________ has the ability to mend whatever damage it sustains, which is a significant benefit.

sternum

The ________, the ribs, the vertebral column, and the skull are the components that make up the axial skeleton.

human skeleton

There are 206 bones in the average ________.

Elastic cartilage

________ is a springy material that may be found in places like the larynx and the outer ear flap.

axial and appendicular

The ___ skeletons are the two primary divisions of the skeleton that make up the human body.

Sesamoid bones

are small and are immersed within tendons

flat bones

provide big surface areas for the attachment of muscles

 long bones

function like levers

flat bones

have large surface surfaces.

medullary canal

The __, also known as the marrow cavity, can be found running along the middle of the shaft of a long bone (like the femur or the humerus). 

Bone tissue

is composed of specialized cells and protein fibers, which are woven into a matrix of water, mineral salts, and other substances. 

Osteocytes

are responsible for maintaining a healthy bone structure

osteoblasts

are responsible for calcifying bone as it is being formed

osteoclasts

are responsible for absorbing bone tissue in areas where it is either degenerating or is no longer required

**Blood vessel**

Rich network of blood vessels nourishes bone

**Compact bone**

Bone gets its strength from this hard, shell-like tissue

**Periosteum**

Fibrous membrane covering entire bone surface (except in joints)

**Cartilage**

The resilient and malleable type of connective tissue