1. Nucleus:
* The control center of the cell.
* Contains DNA, which holds the genetic instructions for the cell.
* Also contains the nucleolus, which produces ribosomes.
2. Ribosomes:
* Tiny organelles responsible for protein synthesis.
* Can be found free-floating in the cytoplasm or attached to the endoplasmic reticulum.
3. Endoplasmic Reticulum (ER):
* A network of interconnected membranes that extends throughout the cytoplasm.
* Rough ER: Studded with ribosomes and involved in protein synthesis and modification.
* Smooth ER: Lacks ribosomes and plays a role in lipid synthesis, detoxification, and calcium storage.
4. Golgi Apparatus:
* Stacks of flattened, membrane-bound sacs.
* Modifies, sorts, and packages proteins and lipids from the ER.
* Plays a role in the formation of lysosomes and secretory vesicles.
5. Lysosomes:
* Membrane-bound sacs containing digestive enzymes.
* Break down waste materials, worn-out cell parts, and engulfed bacteria.
6. Mitochondria:
* The "powerhouses" of the cell.
* Responsible for cellular respiration, which produces ATP (the cell's energy currency).
* Possess their own DNA.
7. Peroxisomes:
* Small, membrane-bound organelles that contain enzymes involved in various metabolic reactions.
* Break down fatty acids, detoxify harmful substances, and produce hydrogen peroxide.
8. Vacuoles:
* Large, fluid-filled sacs that store water, nutrients, and waste products.
* Can contribute to cell turgor pressure.
* Plant cells typically have a large central vacuole.
9. Cytoskeleton:
* A network of protein filaments that provide structural support and help the cell maintain its shape.
* Also involved in cell movement and organelle transport.
10. Centrioles:
* Involved in cell division, specifically in the formation of microtubules.
11. Cilia and Flagella:
* Hair-like or whip-like structures that project from the cell surface.
* Cilia are short and numerous, and they help move fluids or particles.
* Flagella are longer and fewer, and they propel the cell through fluids.
Important Note: Not all organelles are present in all cells. For example, plant cells have chloroplasts, which are responsible for photosynthesis, while animal cells do not.
