The major source of energy for all things comes from the Sun
They use a formula and that formula is
People/Land Area=Population Density
The hemoglobin that is about 65% saturated with o2 in a healthy resting person Systemic veins & pulmonary arteries.
<h3>Define Hemoglobin?</h3>
Hemoglobin is a protein in red blood cells that takes oxygen to body's organs and tissues and elates carbon dioxide from organs and tissues back to your lungs.
Thus, Systemic veins & pulmonary arteries are correct.
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Cell is highly concentrated compared to blood
Inner membrane of mitochondrion
