EP is edible portion, the portion that will be served after it is cooked. AP is as purchased, so the food in its raw state, before it is cooked or put together
CO2 from the blood is released from the blood cells into the alveoli for exhalation while O2 from the alveoli is received into the blood cells to deliver oxygen to other parts of the body
Innate immunity: Immunity that is naturally present and is not due to prior sensitization to an antigen from, for example, an infection or vaccination. Since it is not stimulated by specific antigens, innate immunity is generally nonspecific. It is in contrast to acquired immunity. Also called natural immunity.
Hope this helps