Muscles need this gas from the air to work properly.
What is oxygen?
This kind of muscle moves your arms and legs.
What is skeletal muscle?
Muscles are attached to these to help you move.
What are bones?
This muscle is in your upper arm and helps you lift things.
What is the bicep?
Muscles are attached to bones with these.
What are tendons?
Your muscles use this sugar for energy.
What is glucose?
This kind of muscle works in your heart and never gets tired.
What is cardiac muscle?
This system includes muscles, bones, and joints.
What is the musculoskeletal system?
These muscles are in your stomach area and help you sit up.
What are the abs?
This muscle helps you breathe by moving up and down.
What is the diaphragm?
The signal to make your muscles move comes from this body system.
What is the nervous system?
This type of muscle works automatically in places like your stomach and intestines.
What is smooth muscle?
These stretchy tissues hold bones together at joints.
What are ligaments?
These muscles are on the front of your thighs and help you kick.
What are the quadriceps?
This is the largest muscle in your body.
What is the gluteus maximus?
These tiny parts of a muscle cell do the actual contracting.
What are fibers (or muscle fibers)?
The only place you can find cardiac muscle.
What is the heart?
When you lift your arm, your bicep pulls the bone up. That means the bicep is doing this.
What is contracting?
This big muscle is in your chest and helps you push things.
What is the pectoral muscle?
This is the strongest muscle based on force.
What is the masseter (jaw muscle)?
This metabolic process provides energy for muscles without using oxygen.
What is anaerobic respiration?
These muscles work without you thinking about them.
What are involuntary muscles?
Your triceps and biceps work like this kind of pair: when one contracts, the other relaxes.
What are opposite (or opposing) muscles?
This strong muscle is in your lower leg and helps you jump.
What is the calf muscle?
Your body has approximately this many muscles?
What is 650?