Polycythemia or an increase in red blood cells
the red blood cells will shrivel and collapse since NaCl is hypertonic compared to the red blood cells.
it is red
It loses oxygen!
They wouldn't if anything white would eat red which is an autoimmune disorder.
They get out of your body by your feces
this mostly happens with multi-cellular organisms and red blood cells. Red blood cells lose their nucleus.
Erythropoiesis (making red blood cells) and the synthesis of other blood cells.
Red blood cells are made by the marrow.
They are broken down in the liver.
The gel seperates the serum from the red blood cells
That is virtually impossible but if it did we would have problems with our bloodstream