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Human Body Systems
These are the vocab terms for our human body sytems unit.
21
Science
7th Grade
03/09/2010

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Term
Skeletal System
Definition
The bones of your body working to provide protection and support as well as aiding in the movement of the body
Term
Muscular System
Definition
The muscles of your body that aid in the movement of your body and its parts. The most important muscle is your heart.
Term
Locomotion
Definition
Movement
Term
Voluntary Muscles
Definition
Muscles that you can control the movement of (Ex. Biceps)
Term
Involuntary Muscles
Definition
Muscles that you cannot control the movement of (Ex. Heart)
Term
Integumentary System
Definition
The skin of your body that separates the body from the environment.
Term
Digestive System
Definition
Your mouth, stomach, and associated organs that break down food into smaller pieces to prepare it for absorption into the blood. Eventually the unused portions are eliminated through the anus.
Term
Elimination
Definition
Getting rid of something
Term
Calories
Definition
The unit of energy that is used to measure energy in food.
Term
Fats
Definition
An essential nutrient responsible for storing energy.
Term
Carbohydrates
Definition
An essential nutrient responsible for quick energy.
Term
Proteins
Definition
An essential nutrient responsible for growth and repair, especially the growth of muscle.
Term
Chemical Breakdown
Definition
When food is broken into smaller pieces using chemicals (Ex. Saliva and Gastric Juices).
Term
Physical Breakdown
Definition
When food is broken down into smaller pieces by grinding and squeezing (Ex. Teeth and Stomach Movements).
Term
Excretory System
Definition
The kidneys and associated organs that remove liquid and gaseous wastes from the body.
Term
Respiratory System
Definition
The lungs and associated organs that exchange gasses between the blood and the environment.
Term
Cellular Respiration
Definition
When cells, especially cells in muscle tissue, use oxygen to release energy stored in nutrients and give off carbon dioxide.
Term
Circulatory System
Definition
– The heart, veins, arteries, and capillaries that transport nutrients and oxygen to the cells and take away wastes and carbon dioxide.
Term
Reproductive System
Definition
The organs responsible for producing sex cells and creating offspring.
Term
Endocrine Systems
Definition
The organs that produce hormones that regulate many body functions.
Term
Levels of Organization
Definition
Cells --> Tissues --> Organs --> Organ Systems --> Organism
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