A community of organisms would have a down fall due to an unbalance in the food chain. Since a Grizzly bear is a third tropic level consumer, there would be an increase in tertiary consumers. This would then cause all the other level in a decrease in population due to over eaten.
The medical definition is "an anatomical cavity or passage especially : a chamber of the heart that receives blood from the veins and forces it into a ventricle or ventricles."
