HTHSCI 1H06 Study Guide - Tuberculum Sellae, Portal Vein, Optic Chiasm

• School: McMaster University
• Department: Health Sciences
• Course: HTHSCI 1H06
• Professor: Cale Zavitz

Document Summary

Pituitary (hypophysis: made of two distinct areas, anterior. Arises from an outgrowth of the ectoderm of the roof of the mouth- in embryological development, begins as a pocket on the roof of the mouth- migrates toward the brain. Sometimes called adenohypophysis because it is a gland that makes and releases own hormones. Arises from outgrowth of ectoderm (outer layer of neurological tissue) at base of hypothalamus- starts off in brain and works its way downwards. Sometimes called the neurohypophysis because it arises from neurological tissue: posterior. Rathke"s pouch (hypophyseal pouch) forms- neurohypophyseal bud makes a long stick - infundibulum- most fun word in all of anatomy- an extension of the brain- both infundibulum and. Rathke"s pouch elongate until they meet, forming pars. Midsaggital section: hypophyseal fossa- delicate piece of bone in which pituitary sits, sphenoid sinus- below hypophyseal fossa- usually filled with air, otherwise filled with mucus, optic chiasm- right above pituitary. Low blood pressure and low blood volume.