Autonomic mechanisms in the ductus venosus of the lamb.

  title={Autonomic mechanisms in the ductus venosus of the lamb.},
  author={Flavio Coceani and Ayotunde S. O. Adeagbo and Ernest Cutz and Peter Olley},
  journal={The American journal of physiology},
  volume={247 1 Pt 2},
Morphological and pharmacological studies were performed in the ductus venosus from near-term fetal and neonatal (1 day of age) lambs. Light and electron microscopic analysis demonstrated a concentration of circularly oriented muscle fibers at the junction of the ductus with the portal sinus (the sphincter region). With the use of histochemical methods, adrenergic and cholinergic fibers were visualized in both the sphincter and extrasphincter regions of the ductus. At either site, nerve fibers… CONTINUE READING


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