Right atrium anatomy The right atrium forms the entire right border of the human heart. The right atrium is the receiving chamber for oxygen-poor blood

Sartorius muscle Sartorius muscle is the most superficial muscle in the anterior compartment of the thigh and is the longest muscle in the body spanning

What is RNA polymerase RNA polymerase is an enzyme that produces RNA (ribonucleic acid) and catalyzes the initiation and elongation of RNA chains from a DNA (deoxyribonucleic

What is ring avulsion Ring avulsion injury is sustained by a sudden force pulling a ring from a finger, usually worn on the 4th or

What is Sanfilippo syndrome Sanfilippo syndrome also known as mucopolysaccharidosis type III (MPS 3), is a rare progressive genetic disorders caused by the deficiency of

Sacroiliac joint pain Sacroiliac joint pain is a common cause of buttock and lower back pain ((Wu L, Varacallo M. Sacroiliac Joint Injection. . In:

What is Salter Harris fracture Salter-Harris fracture also called growth plate fracture or physeal fracture, refers to fractures through a growth plate (physis) and are

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