1. Cells

2. Cell A cell is the smallest unit of a living thing. It holds all the structures, or parts, needed to live. The human body contains trillions of cells.

3. Cell Structures Nucleus- an organelle of a cell that controls everything the cell does Cytoplasm- the gel-like liquid that fills a cell Cell membrane- a soft, flexible covering that controls what enters and leaves a cell Vacuole- a storage space within a cell

4. Animal Cell and Plant Cell Animal Cell Cells that are only found in animals Plant Cell Cells that are only found in plants

5. What is the difference between a plant and animal cell? Animal Cell An animal cell has a cell membrane, nucleus, vacuole, and cytoplasm. Plant Cell A plant cell has a cell membrane, nucleus, vacuole, and cytoplasm. They also contain a: cell wall- the outer layer of a plant cell that gives the cell structure and support Chloroplast- a structure that contains chlorophyll and is found in the cells of plants