What makes up the body?

The building blocks of the body are:

• organs

• cells

• systems

• tissues

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How many cells make up your body?

• billions

• millions

• thousands

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A group of cells that look alike and do the same job form:

• a tissue

• an organ

• a system

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A group of tissues that work together to do a job are:

• a system

• a tissue

• an organ

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Different organs working together are called a:

• tissue

• system

• cell

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Your body has ______ systems.

• two

• four

• many

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The cells that make up tissues, organs, and systems are all the same kind of cells.

• true

• false

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What is the smallest part of a living thing?