A cell shows various structures under the microscope. It has two protective coverings which act as barriers from the surrounding region. They are:
Cell wall
- Only plant cells have cell walls, which is a very important structure of the plant cells, while animal cells lack them. It differentiates one cell from the
- It is the outer margin which surrounds the
- It is composed of a non-living rigid structure that is Cellulose. It acts as a protector and gives a proper shape to the plant
- It also helps in cell-to-cell interactions and provides a barrier to undesirable macromolecules.
Cell membrane (Plasma membrane)
- All cells have cell
- It is porous in nature. Thus, any material can move in and out of this
- It is selectively permeable in nature so it allows only specific materials to move across.
Cytoplasm
- The region inside the cell membrane is called the Cytoplasm.
- It is a jelly-like substance filling up the cell space and contains many dot-like structures called the Organelles.
- Each organelle performs a different
Did you know?
Singer and Nicolson’s fluid mosaic model is often used to describe the cell membrane’s structure.
Summary
| Parts of the Cell |
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