Cell

noun · Biology

Definition

The basic unit of structure and function in living organisms.

Cells may be prokaryotic (no nucleus) or eukaryotic (with a nucleus). Many organisms are made of a single cell and others of trillions.

A skin cell is an example of an animal cell.

A cell is not the same as an organelle, which is a part within a cell.

OrganelleA structure inside a cell that has a specific function.
MitochondrionAn organelle where aerobic respiration releases energy for the cell.

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