Answer:
Epidemiology
Explanation:
<u>Epidemiology</u> provided the first solid evidence that smoking caused cancer and heart disease and has continued to yield information on the health effects of this very human habit.
Answer:
The lower portion of the labia
Explanation: The area of the Bartholin glands in the lower portion of the labia may be palpated between the thumb and index fingers of the left hand by placing the index finger just inside the vaginal introitus. Ordinarily, normal Bartholin glands cannot be felt and are not tender.
Answer:
The “lub” is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,” dub” or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.