1. Cell Membrane:
* Function: A thin, flexible barrier that controls what enters and exits the cell, maintaining its internal environment.
2. Cytoplasm:
* Function: The gel-like substance that fills the cell, providing a medium for organelles to move and function.
3. Nucleus:
* Function: The control center of the cell. It contains the cell's genetic material (DNA) and directs protein synthesis.
4. Nucleolus:
* Function: Found inside the nucleus, this structure is responsible for making ribosomes.
5. Ribosomes:
* Function: Tiny structures that manufacture proteins. Some are free-floating in the cytoplasm, while others are attached to the endoplasmic reticulum.
6. Endoplasmic Reticulum (ER):
* Function: A network of interconnected membranes that serves as a transport system for molecules throughout the cell.
* Rough ER: Studded with ribosomes and involved in protein synthesis and modification.
* Smooth ER: Lacks ribosomes and is involved in lipid synthesis, detoxification, and calcium storage.
7. Golgi Apparatus (Golgi Body):
* Function: Stacks of flattened membrane-bound sacs that process, package, and sort proteins and lipids for delivery to other parts of the cell or for secretion outside the cell.
8. Lysosomes:
* Function: Membrane-bound sacs that contain enzymes that break down cellular waste products, worn-out organelles, and foreign materials.
9. Mitochondria:
* Function: The "powerhouse" of the cell, responsible for cellular respiration, which produces energy (ATP) for the cell's activities.
10. Peroxisomes:
* Function: Small, membrane-bound organelles that contain enzymes that break down fatty acids and detoxify harmful substances.
11. Centrosome:
* Function: The organizing center for microtubules, which are part of the cytoskeleton. During cell division, the centrosome duplicates and the microtubules form spindle fibers, which help to separate chromosomes.
12. Cytoskeleton:
* Function: A network of protein filaments that provides structural support, helps maintain cell shape, and facilitates movement within the cell.
Important Note: Not all animal cells have all of these organelles. The specific organelles present and their abundance can vary depending on the cell's type and function.
