The global carbon cycle is now usually divided into the following major reservoirs of carbon interconnected by pathways of exchange: 1  The atmosphere. 2  The terrestrial biosphere. 3  The oceans, including dissolved inorganic carbon and living and non-living marine biota.
Elizabeth Blackwell: First Woman M.D. (Barnard Biography Series, Vol. 2) Mar 1, 1997
Elizabeth Blackwell, M.D., Americaâs first female doctor. Elizabeth Blackwell, M.D. (1821-1910), was the first woman to graduate from medical school in the United States and is often thought of as Americaâs first woman doctor.