1
How many bones does an adult human have?
206 bones.
What is a joint?
The place where two or more bones meet.
How many types of muscles are there?
Three.
Which mineral helps keep bones strong?
Calcium.
Which bone protects your brain?
The skull (cranium).
Which joint is found in the elbow?
Hinge joint.
Which muscle type is under voluntary control?
Skeletal muscle.
Which vitamin helps your body absorb calcium?
Vitamin D.
What is the longest and strongest bone in the body?
The femur.
Which joint allows your head to turn from side to side?
Pivot joint.
Which muscle is found only in the heart?
Cardiac muscle.
What nutrient is important for building muscles?
Protein.
What is the name of the soft tissue inside bones that makes blood cells?
Bone marrow.
Which joint allows movement in many directions, like your shoulder?
Ball-and-socket joint
Which type of muscle moves food through your digestive system?
Smooth muscle
Why is it important to warm up before exercise?
It increases blood flow and helps prevent muscle injuries.
Name two main functions of the skeletal system.
What tissue connects bone to bone?
Ligaments.
Why do muscles work in pairs?
Because muscles can only pull, not push. One contracts while the other relaxes.
Give three ways to keep muscles healthy.