For example, a communication officer may work with a company's CEO to develop a message of family values. Their external communications may include social media and advertising that shows how the organization is devoted to family values.
Medical Definition of Ventilation. Ventilation: The exchange of air between the lungs and the atmosphere so that oxygen can be exchanged for carbon dioxide in the alveoli (the tiny air sacs in the lungs). Last Editorial Review: 5/13/2016.
Ventilation is the process by which air moves in and out of the lungs. Diffusion is the spontaneous movement of gases, without the use of any energy or effort by the body, between the gas in the alveoli and the blood in the capillaries in the lungs. Perfusion is the process by which the cardiovascular system pumps blood throughout the lungs.