What is the primary function of the spleen in relation to red blood cells?

A To produce red blood cells
B To filter out old or damaged red blood cells ✓
C To store platelets
D To activate the complement system

Explanation

The spleen acts as a filter for the blood, removing old, damaged, or abnormal red blood cells from circulation.

Source

Guyton and Hall Textbook of Medical Physiology
Hematology Hematology: Blood Components Hematology: Blood Components Easy MEDICAL Confidence: high