Cell Structure Basics
Your body is made up of trillions of cells, and understanding their ultrastructure (what you see under powerful microscopes) is key to biology success. Think of cells as tiny factories with different departments doing specific jobs.
Animal cells and plant cells share many features but have crucial differences. Both have a nucleus (the control centre), cytoplasm (the jelly-like filling), and ribosomes (protein makers). The cell membrane acts like a selective bouncer, controlling what gets in and out using its phospholipid bilayer structure.
Mitochondria are your cell's power stations, producing energy through aerobic respiration. They're packed with folded membranes to maximise surface area - you'll find loads of them in active cells like neurons that need tons of energy.
Quick Tip: Remember that mitochondria have their own DNA and reproduce independently - they're like tiny organisms living inside your cells!
