Essential amino acids. There are nine amino acids that your body canât make. They are called essential amino acids, meaning you must have them to live. They are found in foods like milk, eggs and meat and also a wide variety of plants. This is part of why you canât survive on a diet of just corn chips for very long.
Definition of PLENUM. 1. a: a space or all space every part of which is full of matter b: an air-filled space in a structure; especially: one that receives air from a blower for distribution (as in a ventilation system). 2.. a: a space or all space every part of which is full of matter b: an air-filled space in a structure; especially: one that receives air from a blower for distribution (as in a ventilation system).
Report Abuse. The plenum is the duct right on top of the furnace. A furnace has 2 ducts. Cold air is sucked-in through the return duct. The air is heated in the furnace and pushed through the plenum, which is the duct on top of furnace.Tam22 Â· 7 years ago. Thumbs up.he plenum is the sheet metal box on top of the furnace that connects the furnace to the rest of the duct work.