Organs are made of tissues, which are made of smaller units called what?

• A. Molecules
• B. Atoms
• C. Cells
• D. Organs

Answer: (C)

Verified step by step guidance

1. Begin by understanding the hierarchy of biological organization. At the most basic level, atoms combine to form molecules.
2. Next, recognize that molecules are the building blocks for cells, which are the smallest functional units of life.
3. Cells group together to form tissues, which are collections of similar cells that perform a specific function.
4. Tissues then combine to form organs, which are structures that carry out specialized tasks within the body.
5. Finally, organs work together within organ systems to maintain the overall function and homeostasis of the organism.