Cells, Tissues, Organs, Systems

The smallest units of human life are called

• cells

• tissue

• organs

• muscles

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Tissues are made up of similar

• organs

• cells

• nervous tissue

• systems

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Organs are made up of

• tissue

• cells

• systems

• functions

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Your heart is one of your most important

• tissue

• cells

• organs

• systems

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The tissue that forms protective barriers is called ____________ tissue.

• epithelial

• nervous

• muscular

• connective

Blood, bone, and fat are all ________ tissues.

• muscular

• nervous

• epithelial

• connective

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Body systems are made up of different

• cells

• tissue

• systems

• organs

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Every organ in the body has a special job, or

• function

• house

• place

• system

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The digestive and excretory ________ process your food and waste.

• tissue

• cells

• systems

• organs

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