5.tissues, organs and systems 1. you know that cells are the smallest part of your body 2 and you...

5. Tissues, Organs and Systems

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You know that cells are the smallest part of your body

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And you know that different cells have different jobs

But cells do not work alone

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Cells that look alike and that do the same job work together in a group

A group of skin cells doing the same job is called skin tissue

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Vocabulary:

tissue

A group of cells doing the same job

One kind of skin tissue covers your body

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Another kind of skin tissue lines your mouth, stomach, and other body parts

Your body has other kinds of tissue

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Bundles of muscle cells form muscle tissue

You also have blood tissue, nerve tissue and bone tissue

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What is happening while you are writing notes?

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Your heart is pumping

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You breathe in and out with your lungs

Your eyes see the words that you write

Your brain helps you understand the words

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All of these body parts are examples of organs

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Vocabulary:

organs

A group of different tissues working together to do a job

Your heart is made of blood tissue, nerve tissue, and muscle tissue

What is the job of your heart?

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Your skin has many different layers

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Each layer has a different job

Your skin is the largest organ of your body

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All the parts of your skin put together form an organ

Your stomach is an organ, too

Your stomach is an organ that helps in the job of breaking down food

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Remember that the smallest parts of your body are its cells

A group of cells doing the same job forms tissue

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A group of tissues working together forms an organ

Organs work in groups, too

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Vocabulary:

system

A group of different tissues working together to do a job

Your body is made up of many systems

Think of a factory where cars are made

One part of the factory makes the metal body

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Another part installs the glass

Still another part of the factory puts on the tires

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You must have all the parts to make a complete car

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Your body systems are like the parts of a factory

Each system does a different job, but they work together to keep you healthy

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