Plant, Bacterial & Fungal Cells (not animal)

Cell Wall

Structure, sustained.

A rigid outer layer that braces the cell against pressure and gives tissues their strength.

Rp 3.800.000

A note

The campaign imagery is a fictional luxury concept. Toggle to Scientific X-Ray for the labelled biological illustration.

Structure

Rigid extracellular layer located outside the plasma membrane. In plant cells, the cell wall consists primarily of cellulose microfibrils embedded within a matrix containing hemicellulose and pectin. Fungal cell walls contain chitin, while bacterial cell walls generally contain peptidoglycan. Cell wall composition therefore differs between organisms.

Function

Maintains cell shape, provides mechanical support and protects cells against physical damage. It also resists the internal turgor pressure generated by osmotic water uptake, preventing excessive expansion and cell rupture.

Where Found

Plant cells, fungal cells, most bacterial cells, many archaea and some protists. Absent in animal cells.

Why It Matters

Cell walls provide structural stability and protection, particularly when water enters cells through osmosis. In plants, the cell wall works together with the central vacuole to maintain turgidity and support the tissues of the organism.

Structure → Function

Strong, interconnected structural materials withstand internal pressure while pores allow water and many dissolved substances to pass through.