What are rheumatoid nodules Rheumatoid nodules are firm, noticeable lumps that form underneath the skin of some rheumatoid arthritis patients. Rheumatoid nodules generally form on

What is the rhythm method The rhythm method is also called the calendar method or the calendar rhythm method, is a form of natural family

What is reverse transcriptase Reverse transcriptase is an enzyme found in HIV (and other retroviruses). HIV uses reverse transcriptase to convert its RNA into viral

What is rhinovirus Rhinovirus C, along with rhinoviruses A and B, is a leading cause of common colds. Rhinoviruses (rhin means "nose") can also cause

What is rheumatic fever Rheumatic fever is a autoimmune inflammatory disease that affects many of the body's connective tissues especially those of the heart, joints,

What is nephroptosis Nephroptosis (nephro = kidney; ptosis = falling) is also called floating kidney or wandering kidney, is an inferior displacement or dropping of

What is the renal pelvis Renal pelvis is a flat, funnel-shaped urine-carrying tube and it is simply the expanded superior part of the ureter. Branching extensions

What is reticulocyte count Reticulocytes are newly produced, relatively immature red blood cells (RBCs). Reticulocytes are "young" red blood cells that are released by the

What is repetitive strain injury Repetitive strain injury (RSI) is a general term used to describe the pain felt in muscles, nerves and tendons caused

What is a normal respiratory rate Respiratory rate is the the number of breaths per minute. Your respiratory rate is highly regulated to enable cells