Final answer:
Organs are formed from tissues working together for a common function, illustrating the hierarchical organization in multicellular organisms.
Explanation:
Organs are formed when a group of tissues work together to perform a common function. For example, the heart is an organ made up of tissues that work together to pump blood throughout the body. Organs then come together to form organ systems like the cardiovascular system, which consists of the heart, blood vessels, and blood.
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