The cell wall is a structure located on the outside of the cell membrane in the cells of plants, bacteria, fungi, and algae. It is a resistant, tough and flexible layer, which has the vital function of supporting the osmotic pressure inside the cell, preventing the cell from lysis when water enters. Besides, it has the function of giving rigidity, support and defining the shape of the cell.
Similarity: both burnings lead to energy production and both result in CO2 emission. difference: food is burned in the process called cellular respiration. this process consists of a few certain stages preventing our body from heat shock.