Where are blood cells made?
Stomach
Pancreas
Bone marrow
Which part of the skeleton protects the lungs?
The femur
The rib cage
The skull
Which of these is a hinge joint?
Shoulder
Hip
Knee
Which two muscles are in your upper arm?
Biceps and triceps
Biceps and hamstrings
Hamstrings and quadriceps
What is the smooth substance at the end of a bone called?
Cartilage
Tendon
Ligament