Cell structure

Following are the main parts of a cell:
Cell Membrane: Cell membrane is also called plasma membrane. It makes the boundary of a cell. It is composed of protein and lipid.
Cell Wall: Cell wall is present in plant cells and in bacteria. Cell wall in plants is made up of cellulose. Cell wall gives additional strength and protection to plant cells.
Cytoplasm: A jelly-like substance is present between the cell and nucleus. It is called cytoplasm. Different cell organelles are present in the cytoplasm.
Nucleus: This is a spherical structure which is present inside the cell; usually at the centre of the cell.
Prokaryotes: When genetic materials are not organized in the form of nucleus, the organism is called prokaryote.
Eukaryotes: When genetic materials are organized in the form of nucleus, the organism is called eukaryote.
Protoplasm: The fluid inside the cell is called protoplasm. Protoplasm is composed of cytoplasm and nucleoplasm.
Vacuoles: Some fluid-filled bag-like structures can be seen inside a cell. These are called vacuoles.
Plastids: Plastid is an important cell organelle and is found in plant cells only.