For artificial ventilation of an elderly patient, it may be easier to form a mask seal if you leave properly fitting _____________________ in place

Physician who performs surgery on respiratory system organs and structures:

A) general surgeon. B) ophthalmic surgeon. C) thoracic surgeon. D) vascular surgeon.

The purpose of macrophages is to ________ pathogens in the lymph

a. create b. engulf and digest c. expel d. increase