Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
A pellicle is a flexible, protective layer found just beneath the plasma membrane of certain unicellular eukaryotic organisms. It provides structural support and maintains cell shape while allowing some degree of flexibility.
5 Must Know Facts For Your Next Test
The pellicle is commonly found in protozoa such as Euglena and Paramecium.
It consists of a series of protein strips arranged in a helical pattern around the cell.
The pellicle allows for gliding motility by flexing and contracting.
It serves as a protective barrier against environmental stress and predation.
The composition and structure of the pellicle can vary between different species of unicellular eukaryotes.