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How Your Body Is Organized

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How Your Body Is Organized

Levels of Organization

• Organized from Simple to Complex– 1. Cells– 2. Tissues– 3. Organs– 4. Organ Systems– 5. Organism

Cells

• Definition: Cell is the basic unit of structure and function

• Your body contains about 100 trillion cells• Cells are tiny and only can been seen with

a microscope• Each cell contains a nucleus, cytoplasm,

cells membrane & other organelles• Cells carry on processes that keep

organisms alive

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Tissues

• Definition: A group of similar cells performing the same function.

• 4 types:– 1. Muscle– 2. Nerve: brain, spinal cord, nerves– 3. Connective: blood, fat, cartilage, bones,

tendons– 4. Epithelial: covers surfaces of body

(outside/inside)

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Tissue Types(Found on page 8)

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Organs

• Definition: Different types of tissue that perform a specific job

• Examples: Heart, liver, lungs, stomach, intestines

• The Heart contains all 4 kinds of tissue and each tissue type contributes to the overall job of pumping blood.

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Examples of OrgansHeart Liver

LungsStomach

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Organ Systems

• Definition: Group of organs that work together to perform a major function

• Systems depend on each other.

(Types of Organ Systems on Following Slides

Found on Page 9)

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Circulatory System• Carries materials to

cells and wastes away from cells.

• Helps fight disease

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Digestive System

• Takes in food breaks it down, and absorbs digested materials

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Skeletal System• Supports body,

protects, works with muscle to allow movement.

• Stores some materials

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Excretory

• Removes wastes

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Nervous

• Detects, interprets information

• Controls most body functions

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Muscular

• Enables body to move

• Moves food through digestive system

• Keeps heart beating

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Immune• Fights disease

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Endocrine • Controls body

processes by means of chemicals

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Reproductive

• Produces sex cells that can unite with other sex cells to create offspring

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Respiratory System

• Takes oxygen into body and eliminates carbon dioxide

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Integumentary System (skin)

• Protects body • Keeps water in• Helps to regulate

body temperature

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Assignment

• Coloring Diagrams:– Cell & Tissue– Tissue & Organ

– Staple and attach to the notes with finished.

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