They are also called an intermediary. The decision made by an FI or a carrier under medicare part A or part B is called the local coverage determination (LCD).
The Lower Mantle, which is 49.2% of the Earth's mass.
Of course, the earth's crust is only the outer portion of the earth. Future research will tell us about the composition of the mantle and core. The most abundant element in the human body is oxygen, making up about 65% of the weight of each person.