How many parts make up the central nervous system

Two.

Explanation:

The central nervous system is made up by the brain and spinal cord.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: