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Home of CELLS alive! Cell Size and Scale. Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.1 mm long.

Cell Size and Scale

That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny. Smaller cells are easily visible under a light microscope. It's even possible to make out structures within the cell, such as the nucleus, mitochondria and chloroplasts. How Big is a ... ? Cells. Plant Cell Structure. Cell Parts Quiz. Organelles flashcards. Crashcourse vids. Immune Attack.

Biology Games. Cell Biology Games, Virtual Labs, Activities. Cells All living things are made of cells!

Cell Biology Games, Virtual Labs, Activities

Learn how they work and what they are made of! Cell organelles such as the nucleus, mitochondria, chloroplasts, ribosomes, lysosomes and many more can be found here.