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Anatomy Atlases: Atlas of Microscopic Anatomy: Section 1 - Cells Atlas of Microscopic Anatomy: Section 15 - Endocrine Glands

Plate 15.279 Hypophysis

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger, Jr., Ph.D.
Peer Review Status: Externally Peer Reviewed


HYPOPHYSIS

Plate 15.279 Hypophysis

Human, Susa, Halmi's* AFT, 11 x.

 

Several features of the hypophysis can be seen in this low-power photomicrograph. Elements of the infundibulum or neural stalk, which develops from the floor of the diencephalon, and the derivatives of Rathke's* pouch, which arise from an outpocketing of ectoderm from the roof of the mouth of the embryo, are shown. The pouch derivatives include the pars distalis and pars intermedia. Note the cyst- like clefts between the pars distalis and the pars intermedia, which are developmental remnants of the primitive cavity of Rathke's pouch. Elements of the important hypophysealportal blood circuit can be seen in the pars tuberalis.

Even at this low magnification, clusters of basophils and eosinophils can be seen in the pars distalis, permitting their study at higher magnifications.

*Halmi is a twentieth-century Hungarian-American endocrine physiologist and Rathke was a nineteenth-century German anatomist.

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