This is a diagram displaying part of the nervous system within the human body.

Q. Define: System

A1. The environment our body's exist and adapt to function within

A2. A couple or a group of people who share identical DNA e.g. identical twins, or triplets, who both/ all behave in a uniform fashion

A3. A group of interconnected or independent organs with a common function

A4. A group of extremities e.g. fingers, that work together to perform a certain task