I have read that RBCsred blood cells (RBCs) metabolize glucose. However they don't have any mitochondria because there is just so much hemoglobin that there is no room for mitochondria without expanding the cell.
So how is it possible for them to metabolize glucose if it is mainly O2O2, CO2CO2, H2OH2O, FAfatty acids (in cell membrane), and Hemoglobinhemoglobin?