Figure 1From: Placentation in dolphins from the Amazon River Basin: the Boto, Inia geoffrensis, and the Tucuxi, Sotalia fluviatilisUmbilical cord of the tucuxi, Sotalia fluviatilis. Shown are part of the urachus and the paired umbilical veins with their vasa vasorum. The stroma is supplied with small blood vessels and contains bundles of smooth muscle (sm). Masson's triple stain. Scale bar = 500 μm.Back to article page