The spheres are merely there to show (to yourself and your visitors) that your dragons are higher than level ten. The shrines will show that your dragons are able to level past ten (or fifteen if it's gold), but the orbs show for each particular dragon that is above level 10.
Hemoglobin is what actually gives your red blood cells the ability to carry oxygen. A high hematocrit simply means that you have a higher concentration of hemoglobin in the blood. First of all, it could indicate dehydration, or normal amount of hemoglobin, but too little blood (plasma) volume. If this is the case, depending on how high the hematocrit is, rehydration might be needed.
This test measures how much of your blood is made up of red blood cells. Normal blood contains white blood cells, red blood cells, platelets, and the fluid portion called plasma. The word hematocrit means to separate. In this test, your red blood cells are separated from the rest of your blood so they can be measured. Your hematocrit (HCT) shows whether you have a normal amount of red blood cells, too many, or too few. To measure your HCT, your blood sample is spun at a high speed to separate the red blood cells.