Which type of blood cells are the most abundant in a healthy human body?
Red blood - or erythrocyte - cells are the most abundant blood cell.
Plasma makes up the biggest portion of your blood at around 54% - however, this is not a type of cell but rather a protein-salt solution.
Red blood cells make up the other 44 % of your bloods volume, and white blood cells (lymphocytes), platelets and other cells count for the remaining 1%.
A red blood cell:
The reason red blood cells are so numerous! is because they perform the most essential function of the blood - transporting nutrients and oxygen to cells (and carrying away waste). Without them, all the cells in your body would quickly die.
I hope this helps, let me know if I can do anything else:)