Age Related Changes in the Capillary Index of the Caprine Hypophysis Cerebri

Khatra, G. S.; Nanda, B. S.

doi:10.1111/j.1439-0264.1984.tb00708.x

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“…Numerous reports describe the mammalian pars intermedia as relatively avascular (Green, 1951;Bergland and Page, 1979;Khatra and Nanda, 1984) in contrast to the pars tuberalis, pars distalis, and infundibular process. Regardless, the pars intermedia is known to elaborate several hormones (Donald, 1980).…”

Section: Discussionmentioning

confidence: 92%

Light microscopic study of the hypophyseal angioarchitecture in the rabbit

Foster

Boyd

1989

Am. J. Anat.

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This study describes the hypophyseal angioarchitecture found in 79 adult New Zealand white rabbits. The pituitary glands and attached hypothalami were removed and carefully processed following routine histological methods, and the vascular organization was studied by light microscopy. Whole mounts of the pituitary median eminence complex were prepared and studied with a binocular dissecting microscope employing transmitted and epi-illumination. Arterial blood was found to be directed primarily to the neurohypophysis by the superior hypophyseal artery (SHA) and the inferior hypophyseal artery (IHA). A direct arterial blood supply was found to the adenohypophysis, but was limited solely to the pars intermedia by branches of the anterior hypophyseal artery (AHA) and the IHA. Capillaries of the pars intermedia were subdivided into an intermediate and a superficial plexus. The superficial plexus was situated between the intermediate plexus and the capillaries of the infundibular process. Capillaries of the superficial plexus did not form anastomoses between themselves, but ramified into the intermediate plexus to form a dense network of anastomosing capillaries that were continuous with capillaries of the pars distalis. A direct arterial blood supply was found only to the superficial plexus.

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