click below
click below
Normal Size Small Size show me how
Organelles
Organelles and their functions
| Term | Definition |
|---|---|
| Prokaryotes | Do not have a nucleus or membrane-bound organelles. BACTERIA |
| Eukaryotes | Have a nucleus and other membrane-bound organelles. |
| Cytoplasm | Jelly like substance enclosed in by the plasma membrane. |
| Nucleus | Contains the cell's DNA. Surrounded by a double membrane called the nuclear envelope. |
| Nucleolus | Makes ribosomes. Found inside the nucleus. |
| Ribosomes | Manufactures proteins. |
| Golgi Bodies or Golgi Apparatus | Stacks of flattened sacs. Packages up proteins and puts them in sacs called vesicles. |
| Mitochondria | Breaks down sugars to supply the body with energy. Known as the Powerhouse of the cell. |
| Centrioles | Organelles made of microtubules (protein) that function during cell division. |
| Lysosome | Contains digestive enzymes and breaks down food and worn out cell parts. |
| Cell Membrane | Controls the movement of materials into and out of the cell. Selectively permeable. |
| Cell Wall | Gives structure and shape to plant and bacterial cells. Called the non-living layer of the cell. |
| Chloroplast | Contain the green pigment chlorophyll. Traps sunlight to make sugar (food). |
| Cytoskeleton | A supporting network of long, thin protein fibers that form a framework for the cell and provide an anchor for the organelles. |
| Vacuoles | A membrane bound sac used for temporary storage of food, enzymes, or waste. |
| Cilia | Short, numerous projections that look like hairs and are used to help the cell move around its environment. |
| Flagella | A long whip like structure used for movement. |
| Cytoplasm | In a typical animal cell, which component contains the greatest amount of water? |
| Cell Theory | 1) All living things are made up of cells. 2) All cells come from existing cells. 3) Cells are the basic unit of structure and function of living things. |
| Robert Hooke | Observed a thin slice of cork under a microscope and called the structures he observed cells. |