| A | B |
|---|
| Cells | The smallest working unit of living things. All organisms are made of them. |
| Anton Von Leeuwonhoek | Invented the first microscope |
| Cell membrane | Separates and protects the cell from its surroundings |
| Two components of a cell membrane | Lipid bilayer and protein channel |
| Nucleus | Command center of the cell |
| Nuclear membrane | Separates and protects the stuff inside the nucleus. |
| Diffusion | The process by which substances spread through a liquid or a gas. When substances move from a region of high concentration to low concentration. |
| Chromosomes | Long pieces of DNA found in the nucleus |
| Cytoplasm | The gel-like fluid inside the cell membrane but outside the nucleus |
| Ribosomes | Protein factories |
| Mitochondria | Energy producers in the cell |
| Vacuole | Used for storing proteins, fats, and carbohydrates. |
| Centrioles | Small structure that helps organize the microtubules |
| Cell Wall | Tough boundary outside the cell membrane. Found only in plants and some bacteria. |
| Smooth ER | Synthesizes lipids and other membrane parts. |
| Rough ER | Place where ribosomes sit and make proteins. |
| Chromatin | Make up chromosomes. They are made of DNA and protein. |
| Golgi Apparatus | Final protein sorter |
| Lysosome | Package waste and break it down |
| Chloroplast | Harvest energy from sunlight. Found only in plants and some bacteria |
| Cytoskeleton | Provides support and structure for the inside of the cell |
| Microtubules | Can assemble into long filaments. They are important in cell division |
| Cilia | Tiny hairs usually used for rowing |
| Flagella | Long hairs used for movement |
| Robert Hooke | Observed rectangular chambers that make up plants. He called them "cells". |
