Newly oxygenated red blood cells carry oxygen to your body. A pulse oximeter uses light to measure the oxygen saturation level, the percentage of hemoglobin in your red blood cells carrying oxygen. Normal oxygen saturation levels fall between 95 and 99 percent.f you're in good health, normal blood oxygen levels almost always fall within a very predictable range. Medical professionals use two primary measurements for determining your blood oxygen level: oxygen saturation and arterial oxygen. The normal values differ for these measurements.
What two metals are found in the inner and outer cores? Iron and nickel compose the bulk of the inner and outer core of the Earth. The bulk of the inner and outer cores, around 80%, are composed of iron. A substantial amount, aroun â¦ d 10%, is composed of nickel, and the remainder is a mixture of other elements.
The core of the Earth is the center. The inner core is solid, and is 90% iron. But the outer core is a liquid... and it's a good thing it is! More on that later. The outer core is made of a mixture of iron and nickel, with smaller amounts of silicon and oxygen. The outer core officially begins at a depth of 2550 km below the surface of the Earth, down to a final depth of 4750 km at the boundary between the inner and outer core.