Class 11 Botany simulations · Cell: The Unit of Life

How big are cells?

Compare the smallest cells (Mycoplasma), bacteria and a human red blood cell, drawn to the same scale.

Open the simulation

What to notice

Mycoplasma is only about 0.3 μm long, bacteria 3–5 μm and a human RBC about 7 μm across.

Key relation

1 μm = 10⁻⁶ m

Try this

Zoom out: how many Mycoplasma cells would fit across one RBC?

What you can change

• Zoom (μm across view): 1 to 20 μm

More in Cell: The Unit of Life

• Cell explorer
• Fluid mosaic model of the membrane
• Why cells are small: surface area to volume

See all Class 11 Botany simulations or every Physica simulation.