Plasma Cell
The immune system's antibody factory. Produces thousands of antibodies per second to fight invaders.
Red Blood Cell
The oxygen courier. 25 trillion of these biconcave discs deliver oxygen to every tissue in your body.
Neuron
The brain's messenger. Watch action potentials propagate via saltatory conduction along myelinated axons.
Macrophage
The "big eater". Engulfs and digests pathogens, dead cells, and debris.
Sarcomere
The sliding filament mechanism. Watch myosin heads perform the power stroke to contract muscle.
Kinesin Motor
A molecular walker. Watch it step hand-over-hand along microtubules, transporting cargo across the cell.
Keratinocyte
Your skin's building block. Produces keratin to form the waterproof barrier that protects you from the world.
Rod Photoreceptor
The night watchman. Detects single photons with stacked rhodopsin discs, enabling vision in near-total darkness.
E. coli
The most studied organism on Earth. A Gram-negative prokaryote with flagella, no nucleus, and a 20-minute doubling time.
Plasmodium
The malaria parasite. Invades red blood cells, remodels them from within, and evades the immune system.
T Cell
The immune commander. Coordinates attacks and directly kills infected cells.