* Centrioles: These small, cylindrical structures are involved in cell division, specifically in organizing microtubules that form the spindle fibers which separate chromosomes.
* Lysosomes: These membrane-bound organelles contain enzymes that break down waste materials, cellular debris, and even invading bacteria or viruses. They are the "recycling centers" of the cell.
* Cilia and Flagella: These hair-like projections extend from the cell surface. Cilia are short and numerous, often used for movement of fluids or particles. Flagella are longer and fewer in number, used for locomotion.
* Gap Junctions: These specialized cell junctions allow for direct communication between adjacent animal cells. They form channels for the exchange of small molecules and ions.
* Desmosomes: These junctions act like "spot welds" that hold cells together in tissues that experience mechanical stress, such as skin or muscle.
Key Differences:
* Cell Wall: Plant cells have a rigid cell wall made of cellulose that provides structural support and protection. Animal cells lack this.
* Chloroplasts: Plant cells contain chloroplasts, the organelles where photosynthesis takes place. Animal cells do not have chloroplasts.
* Vacuoles: Plant cells typically have a large central vacuole that stores water, nutrients, and waste products. Animal cells may have smaller vacuoles, if any.
Let me know if you have any other questions!
