The ____ valve is between the right ventricle and the pulmonary trunk. 

An advanced directive is a legal document that can appoint a person to make medical deci-

sions for a patient who is unable to do so. Indicate whether the statement is true or false

A collection of pus in the pleural space is known as:

a. empyema b. hydrothorax c. hemothorax d. thoracentesis