Nephrology is the study of which organ?

Nephrology is the branch of medicine that focuses specifically on the kidneys and their functions, diseases, and treatment. This field encompasses a wide range of conditions, including chronic kidney disease, kidney stones, and hypertension related to renal issues. The term 'nephro' itself comes from the Greek word 'nephros' which means kidneys. Understanding nephrology is vital for professionals in the medical field, particularly in areas that deal with kidney health, dialysis, and transplantation.

The other options do not align with the definition of nephrology: liver study pertains to hepatology, heart study relates to cardiology, and lung study is associated with pulmonology. These distinctions clarify why the focus of nephrology is exclusively on the kidneys.