A dual-chamber pacemaker is surgically placed in a patient’s chest. Wires then carry pulses to the right atrium and the right ventricle. Why would the pulses be carried to the right chambers of the heart and not the left chambers?

If an older patient came in complaining of joint pain, and a scan showed the bones in the patient’s hands rubbing one another, you would diagnose

The intake of alcohol, cigarette smoke, and insufficient amounts of vitamins may all cause birth defects in a developing fetus.

The major excretory organ of the human urinary system is the

In the human male and female reproductive systems, each system contains paired primary sex organs called _____, which contain _____ that give rise to gametes.

If you wanted to change airflow to alveoli, what tissue would you need to target?

In humans, the muscular tube into which urine from the kidney first drains is the

The enzyme that breaks down fats is

If you were a doctor working with a patient whose digestion had slowed markedly, you might measure the patient’s production of

Although the lymphatic system has many similarities to the circulatory system, what can the lymphatic system accomplish that the circulatory system cannot?