The human complement system has a pivotal role in the recognition, opsonization and elimination of microbial intruders. This functionality is maintained by a well-balanced interaction network of serum ...

The complement cascade is a biochemical process in the blood that helps or 'complements' cells of the immune system to eliminate invading pathogens. When activated by one of three pathways, a cascade ...

Lucas Downey is the co-founder of MoneyFlows, and an Investopedia Academy instructor. Dr. JeFreda R. Brown is a financial consultant, Certified Financial Education Instructor, and researcher who has ...

Foods high in vitamin A include organ meats, sweet potatoes, carrots, eggs, fish, and dairy products. You can also find vitamin A in dietary supplements. Vitamin A plays a role in your vision, bone ...

Discover how coupon bonds work, their benefits in today's market, and how they affect your investment strategy. Understand the nuances of semiannual interest payments.