The life span of red blood cells is
The life span of red blood cells is
A: 100 days
B: 160 days
C: 120 days
D: 180 days
Red blood cells have a life span of approximately 120 days in humans; after which they are broken down in the spleen. Other options (100; 160; 180 days) are incorrect. The correct answer; C) 120 days; is a fundamental biology fact; commonly tested in everyday science sections of competitive exams.