Cell The Unit of Life - The Cell Theory
➡️ All living things are made of cells.
➡️ The cell is the basic unit of structure and function in living organisms.
➡️ All cells arise from pre-existing cells (stated by Rudolf Virchow).
Cell The Unit of Life - Basic Cell Structure
➡️ Cell Membrane: Controls what enters and leaves the cell.
➡️ Nucleus: Contains genetic material (DNA) and directs cell activities.
➡️ Cytoplasm: Jelly-like substance where most cellular activities occur.
➭ Organelles: Specialized structures with specific functions, like:
- Mitochondria: Powerhouse of the cell, produces energy.
- Ribosomes: Protein builders.
- Endoplasmic Reticulum: Transports materials and helps with protein synthesis.
- Golgi apparatus: Packages and distributes materials.
- Lysosomes: "Digestive system" of the cell, breaks down waste.
Cell The Unit of Life - Types of Cells
➭ Prokaryotic Cells: Simpler cells, lack a nucleus and membrane-bound organelles (e.g., bacteria).
➭ Eukaryotic Cells: More complex cells, have a nucleus and membrane-bound organelles (e.g., animal and plant cells).
Cell The Unit of Life - Cell Functions
➡️ Growth and Development: Cells increase in size and number.
➡️ Nutrition: Cells take in nutrients and use them for energy and growth.
➡️ Metabolism: Chemical reactions that break down and build up molecules.
➡️ Respiration: Cells use oxygen to release energy from food.
➡️ Excretion: Removal of waste products.
➡️ Reproduction: Cells divide to create new cells.
Cell The Unit of Life - Additional Notes
