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Bones
Chapter 13.1
27
Science
7th Grade
03/06/2013

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Term
From smallest to largest, the body's levels of organization are:
Definition
Cell, tissue, organs & organ system.
Term
What are tissues?
Definition
A group of specialized cells that perform the same function.
Term
What are the 4 types of tissues?
Definition
Muscle, nervous, connective & epithelial.
Term
What is the job of muscle tissue?
Definition
Makes parts of your body move by contracting or shortening.
Term
What does nervous tissue do?
Definition
Directs & controls the process. They carry electrical messages between the brain & other parts of the body.
Term
What does connective tissue do?
Definition
Provides support for your body & connects all its parts.
Term
What are examples of connective tissue?
Definition
Bone tissue & fat.
Term
What is epithelial tissue?
Definition
Tissue that covers the surfaces of your body inside & out.
Term
What is an organ?
Definition
A structure that is composed of different kinds of tissue & does a specific job.
Term
What are examples of organs?
Definition
Stomach, heart, brain & lungs.
Term
What kind of tissue does the heart contain?
Definition
All four - muscle, nervous, connective & epithelial.
Term
What is an organ system?
Definition
A group of organs that work together to perform a major function.
Term
How many organ systems does the human body contain?
Definition
11
Term
For each system to function, what must happen?
Definition
It's organs, tissues & cells must work together.
Term
Muscular System
Definition
Muscles
Term
Nervous System
Definition
Receives information & commands the body to respond.
Term
Skeletal System
Definition
Bones & connective tissue.
Term
What is the body's largest organ?
Definition
Skin
Term
Where is urine stored till is leaves the body?
Definition
Bladder
Term
What creates urine?
Definition
Waste from the kidneys is combined with water.
Term
What are pathogens?
Definition
Bacteria & viruses.
Term
What are antibodies?
Definition
Proteins that destroy pathogens.
Term
What is immunity?
Definition
Destroys pathogens before they cause disease.
Term
What are hormones?
Definition
Chemicals that change the activity in your body's cells.
Term
What are glands?
Definition
Tissues that produce & release hormones.
Term
How does your body maintain homeostasis?
Definition
When your too warm, your body sweats to cool down. When you are cold, you shiver, which produces heat.
Term
What does your muscles do when you shiver?
Definition
Rapidly contract & relax.
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