ANHB2214 Lecture Notes - Lecture 17: Pars Tuberalis, Anterior Pituitary, Sella Turcica
26 Mar 2020
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Endocrine system: members produce hormones and hormonally-active substances that enter circulation for transport to target cells, components, pituitary gland (hypophysis, pineal gland (part of the epiphysis, thyroid, parathyroid, adrenal (suprarenal) gland, pancreas. Its an evagination of the oropharnyx ectoderm: posterior pituitary (neurohypohysis, pars nervosa. Infundibulum: storage site for neurosecretions of hypothalamic neurons. It"s a downgrowth of neuroectoderm of floor of the 3rd brain ventricle: derived from 2 different embryological origins, cells named by staining, chromophobes 50, chromophils: Basophils 10: cells named by function, somatotrophs 50% Adrenal cortex: gonadotrophs 10% (basophilic cells) 100 000 neurosecretory neurons whose cells bodies are in the hypothalamus. Pineal gland: develops from neuroectoderm in the posterior wall of the 3rd ventricle. 95% pinealocytes== produce and secrete melatonin in response to darkness. Corpora arenacea brain sand composed of calcium and magnesium salts: develops from neuroectoderm in posterior wall of. Thyroid gland: anterior and inferior to the larynx consists of.
