Inside your skin you have a framework of .................

• bones

• nonliving things

• muscles

• Humans

Bones are ..................

• organ systems

• organs

• tissues

• cells

The framework of bones is called the ........... system.

• circulatory

• muscular

• skeletal

• respiratory

Your bones have a soft material in the center and lots of holes like a sponge near the ends.

• True

• false

An adult human body has ............... bones of different sizes and shapes.

• 333

• 260

• 300

• 206

Bones in your arms and legs are short and stubby.

• True

• false

Bones come together at joints.

• True

• false

Joints between chest bones do not move at all.

• True

• false

Elbows and knees, bend like ....................

• slight back-and-forth

• do not move at all.

• door hinges

• move in all directions