muscular and skeletal system

where are blood cells made

• heart

• leg

• bone marrow

• bone

what are the two bones in lower arm called

• chicken and rice

• ulna and radius

• bone and leg

• humerus and radius

There are _____ bones in your body

• 105

• 306

• 205

• 206

Which part of the skeleton protects the lungs

• rib cage

• your brain

• heart

• liver

What is the smooth substance at the end of a bone called

• bone

• cartilage

• bone marrow

• joints