Morphology and histochemistry of the oviduct and egg-jelly layers in the frog,Rana pipiens

摘要: Morphologically the oviduct of frog, Rana pipiens, consists a lining epithelium and tubular jelly-secreting glands. The can be divided into six regions (designated R1 anteriorly—R6 posteriorly) based on differential staining jelly measured 1, 5, 6, 3, 20 3 cm, respectively. These correspond to 6 histochemically distinct layers J1 nearest egg through J6 farthest from egg) which are deposited around during egg's sojourn in oviduct. A correlation between lengths each oviducal region thickness individual was observed. That is, J5 is thickest, followed by J3, 2, 4 thinnest. Histochemical properties glands corresponding were essentially same tests performed. All except R5 contain large amount acid mucopolysaccharide R J1, sulfated. Neutral present R2, J2, J5. Although protein all it found higher concentration lowest J2.