Text Appearing Before Image: UBINARY OKGANS. 309 p. 310) project; on the summits of these the urinary tubules open in varying number (between Pr and Co). The calyces are continu- ous with a large cavity in the widened portion of the ureter called the pelvis (Pe), and from this the ureter (Ur) passes backwards to Text Appearing After Image: FIG. 242.—MALE URINOGENITAL APPARATUS OF HERON (Ardeacinerea). N, kidneys ; Ur, ureter, opening into the cloaca (Cc) at Sr; Ho, testis ; Ep, epi- didymis ; Vd, vas deferens, which opens at Vd1 on a papilla in the cloaca ; V, V, furrows on the ventral surface of the kidney in which veins lie embedded ; Ao, aorta ; BF, bursa Fabricii, which opens into the cloaca at BF1.
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