Bones Basics
What is the main job of the skeletal system?
Support the body and protect organs
What do muscles do when you move your body?
They contract and relax
What is the place where two bones meet called?
A joint
What organ is protected by the rib cage?
Heart and lungs
True or False: Bones are alive.
True
How many bones are in the adult human body?
206
What are the three types of muscles?
Skeletal, smooth, and cardiac
What type of joint allows your elbow and knee to bend?
Hinge joint
What part of the skeleton protects the spinal cord?
Spine (vertebrae)
What is the smallest bone in the human body?
Stapes (in the ear)
What is the longest bone in the human body?
The femur
Which type of muscle is attached to bones?
Skeletal muscle
What type of joint allows your shoulder to move in many directions?
Ball-and-socket joint
Which bone protects your heart?
Rib cage / sternum
About how many muscles are in the human body?
About 600
Which bone protects your brain?
The skull
Which muscle works without you thinking about it and pumps blood?
Cardiac muscle
Why are joints important?
They allow movement and flexibility
What would happen if we didn’t have a skeletal system?
We couldn’t stand, move, or protect organs
What happens to a muscle when it contracts?
It shortens
Name two jobs of bones besides support.
Protect organs, help movement, make blood cells, store minerals
Which type of muscle is found in organs like the stomach and intestines?
Smooth muscle
Name one joint that does NOT move much
Skull joints
Why are bones strong but not solid all the way through?
To be strong but lightweight
Why is exercise good for muscles and bones?
Makes them stronger and healthier