patent ductus arteriosus, ductus, neural tube, glottis, urethral sphincter, mitral stenosis, inguinal canal, intraventricular, arteriotomy, myelomeningocele, corpus luteum, eustachian tube, septal, ischaemia, thoracic duct, atrial septal defect, venous blood, cardiac tamponade, bronchi, intracerebral, conceptus, hepatic vein, arterioles, umbilical vein, extravascular, comedones, inferior vena cava, atresia, stenotic, peritoneum, jejunal, ligated, autoregulation, spermatic cord, pylorus, laryngospasm, subarachnoid space, foetal, thoracentesis, embolus, aneurysmal, cardiac insufficiency, ureters, hydrops, atrioventricular, caval, pyloric, expiratory, vasodilatation, tricuspid valve, coronary sinus, dehiscence, phrenic nerve, pulmonary artery, subclavian artery, intracardiac, pyloric stenosis, pharyngeal, tympanic membrane, nephron, paracentesis, aortic arch, semipermeable membrane, arteriovenous, iliac artery, tamponade, anal canal, epiphysis, thrombosed, valsalva maneuver, ostium, tubal, popliteal artery, vas deferens, urethra, septal defect, hydronephrosis, hypoplasia, foramen magnum, electrical conduction, pericardial sac, intervertebral disk, ectopic, pancreatic duct, coronary occlusion, subclavian, coarctation, omental, superior mesenteric artery, diaphragmatic, peritoneal cavity, amniotic cavity, pulmonary stenosis, epididymis, splenic artery, thyrotropin, diastole, extracellular fluid, duodenal, uterine cavity, distally, bleb