By Seiichiro Kawashima (auth.), Professor Akira Matsumoto, Professor Susumu Ishii (eds.)
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Additional info for Atlas of Endocrine Organs: Vertebrates and Invertebrates
0]]-1 ACTH-immunoreactive cells are recognized in the zona tuberalis. ( x 1000) 0]]-2 The adjacent section ofD1)-1. LH-immunoreactive cells are different from ACTH-immunoreactive cells. ( x 1000) 0]]-3 The adjacent section of01]-l. ACTH cells stain violet, GTH cells pale blue. Trichrome. (X 1000) 3 Hypophysis 49 Fine Structure and Secretory Mechanism of the Pars Distalis Rinehart and Farquhar (1953) first observed that acidophils and basophils in the rat pars distalis contain large secretory granules (about 350 nm in diameter) and small ones (140200 nm), respectively.
O:±]-1 PRL-immunoreactive cells in the Japanese quail pars distalis. ( x 1000) o:±]-2 The adjacent section of[}I]-1. PRL cells stain red. Trichrome. ( x 1000) o:±J-3 TSH-immunoreactive cells in the pars distalis of the thyroidectomized Japanese quail. The hypertrophied cells are called thyroidectomy cells. ( x 1000) o:±]-4 The adjacent section of[}I]-3. The thy· roidectomy cells are hypertrophied and vacuolated. Trichrome. ( x 1000) o:±]-5 LH-immunoreactive cells in the Japanese quail pars distalis.
The adenohypophysis is located in the connective tissue between the brain and nasohypophyseal sac. The distribution of secretory cells is different between the rostral (RPD) and caudal (CPD) regions. The pars intermedia (PI) contacts with the pars nervosa (PN). BS Blood sinus; ME median eminence; V the third ventricle. ( x 75; courtesy of K. Tsuneki) ] Section of the hypophysis of a shark, Etmopterus luciferi. The welldeveloped pars intermedia (PI) intermingles with the pars nervosa (PN), the two together forming a pars neurointermedia.