Learn: Cell Biology

Welcome!Today we'll learn about cell biology. This includes studying cell structure, how cells work, and how substances move in and out of cells. Let's dive in!

What is a cell?Cells are the basic building blocks of all living organisms. They provide structure and carry out specific functions to keep the organism alive. Some organisms are made of one cell (unicellular), while others are made of many cells (multicellular).

Animal and Plant CellsBoth animal and plant cells are eukaryotic, meaning they have a nucleus. However, plant cells have extra structures like a cell wall, chloroplasts, and a large vacuole, which animal cells do not have.

MicroscopyMicroscopes allow us to see cells and their structures in detail. Light microscopes use light to magnify objects, while electron microscopes use electrons for much greater magnification and resolution.

Cell Division: MitosisMitosis is the process by which a cell divides to produce two identical daughter cells. It’s important for growth, repair, and replacing damaged cells. The stages include prophase, metaphase, anaphase, and telophase.

Transport in CellsSubstances move in and out of cells through three main processes: diffusion, osmosis, and active transport. These processes help cells take in nutrients and remove waste.

DiffusionDiffusion is the movement of particles from an area of high concentration to an area of low concentration. It happens, for example, when oxygen moves from the lungs into the blood.

OsmosisOsmosis is the movement of water across a partially permeable membrane from an area of high water concentration to an area of low water concentration. This is essential for maintaining cell structure and function.

Review Time!Great work! You've learned about cells, cell division, and transport. Let's review these key concepts.