Answer:
Cell is a system where each part of it performs a specific job. For every function, there is a structure present called organelle. Some organelle are responsible for the production of energy and proteins for the cell.
Some organelle is responsible for the excretion of waste material and some do the job of storage house.
When many cells combine together, tissue formed and when tissues group together form an organ and when different organs work together they form an organ system. So we can say that cell is a system.
