I think its Multicellular Organisms,., i could be wrong
Through the atmosphere and through <span>oceanic conveyer belts that act as physical pumps</span>
Pepsinogen, an inactive zymogen, is secreted into gastric juice from both mucous cells and chief cells. Once secreted, pepsinogen is activated by stomach acid into the active protease pepsin, which is largely responsible for the stomach's ability to initiate digestion of proteins.
