Cell – Basic Unit of life

Eukaryotic Cell
Eukaryotic Cell

Cell Wall

  • The thick, not soft and outer covering of the cell
  • Non-living part of some cells.
  • Not present in all cells (animal cells)
  • Available only in eukaryotic plant cell & prokaryotic cells
  • Freely permeable (means allow the flow of all substances)

Functions :

  • Protects cell membrane from external & mechanical injuries
  • Prevents dryness in cells by preventing moisture
  • Helps in the transport of various substances
  • Determines the shape of the cell i.e shape of the cell is as per the cell wall structure.



Plasma Membrane

1. Outer covering of cell in animals & inner to the cell wall in plants

2. Living part of the cell

3. Thin, delicate, elastic & selectively permeable

4. Isolates contents of the cell from the external environment

5. Selectively permeable (means allow the flow of selective substances)

Function: Transport of substances on a selective basis in & out of the cell.

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