a decrease in oxygen will result with an increase of red blood cell production (more carriers for hemoglobin to compensate for the lower levels of oxygen). The kidneys produce erythropoietin that stimulate RBC production.
It doesn't effect the hematocrit at all
Hematocrit is the concentration of cells in the blood, measured by the relationship between the cells in the blood (red and white) and the liquid part of the blood called plasma. Normally the less amount of liquid in the body the fewer amounts there will be in the blood itself, therefore the cell/plasma ratio will decrease making the blood more concentrated. That's why the bigger the dehydration, the higher the hematocrit.
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Increased hematocrit is the effect of living at high elevation. The human body compensates by increasing the volume of RBC in order to absorb as much oxygen on areas of high atmospheric pressure.
food
Its really simple if you think about it. if you have a bacterial infection your white blood cell count would increase because as the wbc's are fighting off the infection they die off releasing a chemical into the blood stream that tells your body to increase production of white blood cells. so the hematocrit would have a thicker buffer layer. the buffer layer being the white blood cells. With a higher production of white blood cells the rbc production would very slightly decrease which would decrease the ratio of rbc to whole blood volume.
The possible effects of low hematocrit is that the body lacks enough red blood cells to efficiently oxygenate the body. The body is also cannot clot wounds as efficiently. This lack of oxygen will effect the body systems as must of the O2 rich cells are diverted to the brain.
Kidneys is the major one
The kidneys do not effect your lungs even if they don't work. However, you'll die shortly after your kidneys fail.
Anemia will reduce the Hematocrit levels. Normal Hematocrit levels are 37-47 in females and 42-54 in males. In anemia, the levels are below normal. In polycythemia, they are above normal.
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There will be a decrease in price and quantity.