Our body is formed of systems which is a collection of organs. 

Organs is formed of tissues which is composed of trillion of cells. 

A cell is the smalles unit of life. 

A cell is like a factory composed of a group of structures inside.

A cell is composed of group of organelles like : Nucleus, Rough endoplasmic reticulum, smooth endiplasmic reticulum,  golgi complex, ribosome, centrioles,  cytoskeleton. 

What distinguishes plant cell from animal and human cell ? 

The only cell in our body that contains a flagellum. 

Sites in human body contain cilia. 

How a cell can divide ? 

How a cell can eat and digest bacteria ?

Home of energy inside a cell  ?

How can I inheret a character from my father. ?