The correct answer is C. Heart.
A pacemaker is a small device that is implanted in the chest to help control the heart rate. It is usually used in people who have a slow heart rate, which can cause symptoms such as fatigue, shortness of breath, and fainting.
The pacemaker is made up of a battery, a generator, and leads. The battery powers the generator, which sends electrical signals to the leads. The leads are attached to the heart muscle, and the electrical signals cause the heart to beat at a regular rate.
Pacemakers are usually implanted under the skin in the chest, near the collarbone. The procedure is usually done under general anesthesia, and the patient can usually go home the same day.
Pacemakers are very effective in treating slow heart rates. They can improve quality of life and reduce the risk of death.
The other options are incorrect because:
- The liver is an organ that filters toxins from the blood and produces bile.
- The brain is the organ that controls all of the body’s functions.
- The lungs are the organs that take in oxygen and release carbon dioxide.