Ahealthy immune system depends on an adequate supply of proteins that bind to and neutralize harmful invaders. what are these proteins known as?

A healthy immune system depends on an adequate supply of proteins that bind to and neutralize harmful invaders. These proteins are known as complements and are composed of 25% plasma proteins. The complements are inactive, unless there is an invader. Invaders activate the protein and PTH (parathyroid hormone) is created between the invader and the protein. 

11. gene12. allele13. crossing over14. linked15. gene16. x17. males, femalesapologies if numbers are out of order.