Reabsorption
Reactant
Receptor site
Receptor
Recruitment
Red muscle fibers
Regenerative
Relative refractory period
Renal
Renal artery
Renal columns
Renal corpuscle
Renal cortex
Renal hilus
Renal medulla
Renal pelvis
Renal pyramid
Renal sinus
Renal vein
Renin
Repolarization
Resistance
Respiratory acidosis
Respiratory alkalosis
Respiratory bronchiole
Respiratory distress syndrome
Respiratory membrane
Respiratory pump
Respiratory zone
Resting membrane potential
Resting potential
Retroperitoneal
Ribose
Right atrium
Right AV valve (tricuspid)
Right coronary artery
Right pulmonary artery
Right pulmonary veins
Right ventricle