Red blood cells ( aka ERYTHROCYTES ) are cells that are in the shape of a biconcave disc, 7-8 micrometer in depth. They have a larger TSA/V ratio that increases the rate of gases exchange. It doesn't have a nucleus as it helps to provide more space for haemoglobin to be packed in the cell.
Sel darah merah mengandungi hemoglobin yg membantu membawa oksigen dengan bergabung dengannya dan membentuk oksihemoglobin