Imagine a doctor who specializes in cardiovascular medicine working with a patient whose heart has always beat a bit too fast. Hypothetically, how might their work intersect with that of a respirologist (lung doctor)? How do the two systems (cardiovascular and respiratory) interact?

The heart is mainly responsible for cell nourishment and respiration, since the heart is also connected to the lungs through the pulmonary artery and vein. A lung doctor is vital to maintain the breathing phase of the patient, especially when blood supply to the lungs is irregular due to the heartbeat.

answer: the answer is d.

explanation: this is because when you exercise you make your muscle produce a certain liquid, that does not evaporate it.   also when you exercise you do not reduce muscle fiber.   and it does not really control your twitch that much.