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| Red Blood Corpuscles (RBC) |
White Blood Cells (WBC) |
|
|
Image |
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| Colour | Red |
Colourless |
|
Size |
Around 7.2 micrometer (smaller than WBC) |
10 to 20 micrometer |
|
Number |
4 to 6 million per mm 3 (More in number than WBC) |
6000 to 9000 per mm 3 |
| Shape |
Biconcave (Curved inward at the center on both sides) |
Round to Amoeboid (One portion protruding out) |
|
Nucleus |
Absent (thus called corpuscles - minute particle regarded as the basic constituent of matter ) |
Present |
|
Hemoglobin |
Present |
Absent |
|
Organelles |
Most are absent |
Present |
|
Types |
Only 1 type |
5 types; Neutrophils, Eosinophils, Basophils, Monocytes, Lymphocytes |
|
Life span |
120 days |
Few hours to 4 days |
|
Role |
They transport gases, mainly Oxygen |
They help in defence and immunity |
