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.
Like the Army and the Air Force, the Navy does have a reserve component associated with it. Navy Requirements to Join. Marines. The Marines are the second smallest branch of the military.Their purpose has changed somewhat over the years. When it was first established in 1775, it was under the Navy as a ground force element of the branch.he Marines are the second smallest branch of the military. Their purpose has changed somewhat over the years. When it was first established in 1775, it was under the Navy as a ground force element of the branch.