Umbilicus, [21]
Ungulata, cæcal pouch of, [229]
ileo-colic junction of, [209]
Urinary bladder, in human embryos, [27]
relation to allantois, [24]
Urinator imber, diverticulum cæcum vitelli, [35]
lumme, diverticulum cæcum vitelli, [35]
pyloric valve of, [45]
Urodæum, [25]
Urodele Amphibian, abdominal vein in, [157]
caudal vein in, [156]
ducts of Cuvier in, [156]
hepatic-portal system of, [157]
iliac vein in, [157]
post-cardinal veins in, [157]
post-cava in, [157]
renal-portal system in, [156]
venous system of, [156]
Uro-genital cleft, [27]
Ursus, ileo-colic junction of, [212]
maritimus, intestinal villi, [195]
Uvula, [42]
Vagus, gastric distribution of, [43]