A miscarriage is the spontaneous end of a pregnancy at a stage where the embryo or fetus is incapable of surviving, generally defined in humans at prior to 20 weeks of gestation.

The function of a double-lumen endotracheal tube is to:

a. facilitate speaking. b. protect one lung from the other. c. maintain a tracheostomy stoma. d. assist in weaning a patient from a TT.

Leukocytes are responsible for:

A. transporting oxygen and carbon dioxide. B. fighting infection. C. the clotting process. D. transporting mineral salts.