Answer:
Organs are structures made up of two or more tissues organized to carry out a particular function, and groups of organs with related functions make up the different organ systems.
Explanation:
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The basic unit of a chemical element.
The answer is C. ribosomes because the ribosomes are the ones that create proteins
The heart, the blood vessels, lymphatic system (or defense system), and the blood are the four main parts of the circulatory system.
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