Studies on closure of the ductus arteriosus. I. Whole-Body freezing as improvement of fixation procedures.
D000818:Animals; D000831:Animals, Newborn / Q000033:anatomy & histology*; D001013:Aorta, Thoracic / Q000033:anatomy & histology; D004373:Ductus Arteriosus / Q000033:anatomy & histology*; D005260:Female; D008867:Microtomy; D051381:Rats