Body Systems

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Your Body has 4 levels
of Organization:
1. Cells
2. Tissues
3. Organs
4. Body Systems
Cells
CELLS:
 Are
the smallest living part of
the body.
 Their function is to break
down food to get energy.
 Oxidation is the process by
which cells use oxygen to
break down food and carbon
dioxide is released.
Tissue
A group of cells that work together to perform a
certain job
There are 4 types of tissue:
1. Epithelial Tissue- covers the skin and internal organs.
2. Connective Tissue - supports the body. It connects one
part of the body to another.
3. Muscle Tissue - responsible for body movements.
Without this your heart would not be able to pump.
4. Nerve Tissue - carries messages throughout your
body about sight, smell, and taste.
Organs
Are two or more different tissues
that work together.
Examples of organs are:
Heart
Stomach
Liver
Kidneys
Lungs
Pancreas
A GROUP OF ORGANS THAT WORK
TOGETHER TO PERFORM A MAIN
BODY FUNCTION.
There are 11 body systems:
1. Skeletal
2. Muscular
3. Nervous
4. Circulatory
5. Respiratory
6. Digestive
7. Excretory
8. Lymphatic
9. Endocrine
10. Reproductive
11. Integumentary
Make-up of a living organism
Cell
Tissue
Organ
Body System
Human Body
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