The pump: Most insulin pumps are about the size of a pager, and contain a reservoir of insulin, the pumping mechanism, battery, computer chip and screen. They are outside of the body, so they are called external pumps.
The mission of the Marine Reserve is to augment and reinforce active. Marine forces in time of war, national emergency or contingency. operations, provide personnel and operational tempo relief for the. active forces in peacetime and provide service to the community.
The United States Marine Corps (USMC) The United States Marine Corps (USMC), separate military service within the U.S. Department of the Navy, charged with the provision of marine troops for seizure and defense of advanced bases and with conducting operations on land and in the air incident to naval campaigns.