Which of the following is a flap of tissue in the heart that prevents blood from flowing backwards?
atrium
pacemaker
septum
valve

Which question should you ask to evaluate the credibility of health information? a.) does the article contain illustrations? b.) is the information up to date? c.) is the information available online? d.) is the information written in the united states?

Dementia is most commonly associated with what?

What are ways that tobacco use can affect familyand socity