Pellicles

Definition

Pellicles are flexible, protective outer layers found in certain protists. They provide structural support and help maintain the cell's shape while allowing flexibility for movement.

5 Must Know Facts For Your Next Test

1. Pellicles are commonly found in protists like euglenoids and ciliates.
2. Unlike rigid cell walls, pellicles allow for some degree of shape change and movement.
3. The pellicle is composed of protein strips or layers just beneath the cell membrane.
4. In ciliates, the pellicle supports cilia, aiding in locomotion and feeding.
5. Euglena uses its pellicle to perform a unique type of movement called metaboly or euglenoid movement.

Related terms

Cilia:

Hair-like structures on ciliates that aid in locomotion and feeding.

Euglenoid Movement: A type of movement facilitated by the flexible pellicle in euglenoids.

Cell Membrane: The semi-permeable membrane surrounding the cytoplasm of a cell.