| RBC | WBC |
|---|
| Erythrocytes are the scientific name for red blood cells. | WBC is also known as Leukocytes. |
| RBCs are shaped like a bi-concave disc | The shape of WBCs is uneven. |
| The diameter ranges between 6 and 8 micrometres. | The diameter ranges between 12 and 17 micrometres. |
| RBC has a lifetime of roughly 120 days | WBC has a lifetime of 12-20 days before being eliminated in the lymphatic system. |
| On maturity, red blood cells do not contain a nucleus. | The presence of a massive central nucleus distinguishes WBCs. |
| These cells are red in colour due to the presence of haemoglobin. | These cells are colourless because they lack pigment. |
| There is just one kind of RBC | Neutrophils, B lymphocytes, T lymphocytes, monocytes, basophils, and eosinophils are all forms of WBCs present in the blood. |
| They aid in the delivery of breathing gases to various regions of the body. | They aid in the production of antibodies that combat disease-causing bacteria. |
| Haemoglobin is a component of red blood cells. | Antibodies are found in white blood cells, as well as MHC (major histocompatibility complex) antigen cell markers. |
| Around 36-50 percent of human blood is made up of these cells. | They account for around 1% of all human blood. |
| The production of RBC is called Erythropoiesis. | The process of WBC formation is called Leukopoiesis. |
| These cells travel between the circulatory and nervous systems. | These cells migrate back and forth between the circulatory and lymphatic systems. |
| Anaemia is caused by a low RBC count. | Leukopenia is caused by a low WBC count. |