The Limbic System which regulates emotional responses such as anger and frustration.
Geriatrician's are specialist in the field of study of the aging also known as <span>gerontology.</span>
The word for the blank is fat.
True, abstinence is the practice of giving up something, it necessarily doesn't have to be all about sex, which is many average thinkers are taught in schools. It can be alcohol or even toys and games!