Animal cell does not have cell wall as : cell wall will make difficult for animal cell to interact with external environment and The presence of a cell wall would make it difficult or even impossible for animals to move.

Introduction:
An animal cell is a type of eukaryotic cell that lacks a cell wall. While plant cells have a rigid cell wall composed of cellulose, animal cells do not possess this structure. The absence of a cell wall in animal cells is due to several reasons, which can be explained as follows:

Lack of Structural Support:
- One of the primary functions of a cell wall is to provide structural support and shape to the cell.
- In plants, the cell wall is made up of cellulose fibers, which provide rigidity and strength.
- Animal cells, on the other hand, have a more flexible and dynamic structure, allowing them to change shape and adapt to different environments.
- The absence of a cell wall allows animal cells to be more versatile and capable of various movements.

Cellular Communication and Interaction:
- Animal cells rely heavily on cell-to-cell communication and interaction.
- The absence of a cell wall allows animal cells to come into direct contact with each other, facilitating the exchange of signals and molecules.
- This direct communication is crucial for various cellular processes such as immune responses, tissue development, and nervous system coordination.
- The lack of a cell wall enables animal cells to form complex and dynamic tissues, which are essential for their functions.

Cellular Transport and Flexibility:
- Animal cells require flexibility for various cellular processes, including movement, phagocytosis (engulfing particles), and cell division.
- The absence of a rigid cell wall allows animal cells to change shape and move more easily.
- Animal cells possess a flexible plasma membrane that can undergo deformation, which is essential for functions such as endocytosis and exocytosis.
- This flexibility allows animal cells to adapt and respond to their environment more efficiently.

Conclusion:
The absence of a cell wall in animal cells allows them to have more flexibility, adaptability, and cellular communication. The lack of a rigid structure enables animal cells to change shape, move, and interact with other cells more effectively. This flexibility is crucial for various cellular processes and the overall functioning of animal organisms.