1) Define Automatic, central, peripheral nervous system. 2) Define Brain
3) Describe Red blood cell with its symptoms, preventive measure, and disease caused by it.​

sorry I just know one 2

Explanation:

A brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It is located in the head, usually close to the sensory organs for senses such as vision. It is the most complex organ in a vertebrate's body.

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.