A cell is a single, and the most simpilest building block of life. It includes various organelles which perform different processes within it.
A tissue is a collection of similar cells which perform a common function
An organ is a collection of tissues which perform a function or functions
A system is a group of organs which perform a function or functions within the body.
A tissue is a collection of similar cells which perform a common function
An organ is a collection of tissues which perform a function or functions
A system is a group of organs which perform a function or functions within the body.
