Thyroid function tests are blood tests that measure hormone levels to check how well your thyroid is working. The most common tests are thyroid-stimulating hormone (TSH) and thyroxine (T4), which help ...

Elizabeth Boskey, PhD, MPH, CHES, is a social worker, adjunct lecturer, and expert writer in the field of sexually transmitted diseases. The testes make sperm and testosterone which are important for ...

Your liver handles metabolic, detoxification, and immune functions, including processing nutrients, making bile for fat digestion, producing blood-clotting proteins, and removing toxins like ammonia ...

Michael Menna, DO, is a board-certified, active attending emergency medicine physician at White Plains Hospital in White Plains, New York. The circulatory system carries oxygen and nutrients ...