1. Cells are the basic structural and functional units of life.

2. There are billions of cells in the human body.
3. Cells were first discovered by Robert Hooke in 1665.
4. Cells can be categorized into two types: prokaryotic and eukaryotic.
5. Prokaryotic cells, like bacteria, lack a nucleus and other membrane-bound organelles.
6. Eukaryotic cells, found in plants, animals, fungi, and protists, have a nucleus and various

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membrane-bound organelles.
7. The nucleus is the control center of the cell and contains the genetic material.
8. Other organelles, such as mitochondria and chloroplasts, are responsible for energy production.
9. The endoplasmic reticulum and Golgi apparatus are involved in protein synthesis and transport.
10. Cells are able to communicate with each other through chemical signals and cellular processes.
11. Cells have the ability to divide and reproduce to create new cells.
12. Cells are responsible for carrying out various functions in the body, such as metabolism, growth, and repair.