Cell wall:

The cell wall is a non-living and strong component of the cell, located outside the plasma membrane. It provides shape, strength, protection, and support to the inner living matter (protoplasm) of the cell.

Structure of Cell wall:

Plant cells have a variety of chemicals in their cell walls. The outer layer of the plant cell wall is known as the primary wall and cellulose is the most common chemical in it. Some plant cells, for example, xylem cells, also have secondary walls on the inner side of the primary wall. It is much thicker and lignin and other chemicals are embedded in it in the walls of neighboring cells there are cytoplasmic connections called Plasmodesmata. Through these connections, cells transfer chemicals among each other.

Presence of Chitin in the Cell wall of fungi:

Fungi and many protists have cell walls although they do not contain cellulose. Their cell walls are made of a variety of chemicals. For example, chitin is present in the cell wall of fungi. Prokaryotes have a cell wall composed of peptidoglycan that is a single large polymer of amino acids and sugar.