What is the primary role of complement system proteins in the blood?

A To aid in blood clotting
B To facilitate the removal of pathogens from the body ✓
C To regulate blood pressure
D To produce antibodies

Explanation

The complement system is a group of proteins that plays a crucial role in the immune system by facilitating the removal of pathogens from the body, either by direct killing or by marking them for destruction.

Source

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