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Health

Grades 3–4 Health Vocabulary

20 essential words with definitions, examples, and quick-check quizzes.

Calorie
noun
A unit of energy in food that your body uses for activity and body functions....
Metabolism
noun
The process by which your body breaks down food to create energy and maintain li...
Fiber
noun
A plant material in food that helps your digestive system work properly....
Calcium
noun
A mineral found in dairy and other foods that makes your bones and teeth strong....
Digestion
noun
The process of breaking down food in your stomach so your body can use it....
Circulation
noun
The movement of blood through your heart and blood vessels to supply oxygen....
Respiratory
adjective
Related to breathing and the organs that help you breathe....
Cardiovascular
adjective
Related to the heart and blood vessels that pump blood through your body....
Flexibility
noun
The ability to bend and stretch your muscles and joints easily....
Posture
noun
The way you hold your body when standing, sitting, or moving....
Sprain
noun
An injury to the ligaments around a joint, usually from twisting it....
Fracture
noun
A break or crack in a bone....
Antibiotic
noun
Medicine that kills bacteria and helps cure bacterial infections....
Immune System
noun
Your body's defense system that fights off germs and prevents illness....
Blood Pressure
noun
The force of blood pushing against your blood vessel walls....
Heart Rate
noun
The number of times your heart beats per minute....
Diet
noun
The food and drink that a person regularly consumes....
Dehydration
noun
A condition where your body doesn't have enough water or fluids....
Infection
noun
A condition where harmful germs enter your body and multiply, causing illness....
Symptom
noun
A sign or signal that shows your body is sick or injured....

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