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Anatomy and Embryology Endocrinology (Pit. Gland (Anterior (Axons from…
Anatomy and Embryology Endocrinology
Pit. Gland
Contacts Hypothal, Controls other endocrine
Infundibulum: attaches to base of brain
Sphenoid bone
Posterior
neuroectoderm of diencephalon
Neural tissue, non-myelinated pituicytes
Anterior
oral ectoderm of mouth roof
Axons from hypothal via neurohormone
Primary plexus
endocrine cells
Composed of epithelial cells with capillaries
Hypophysial diverticulum: Represses into stalk
Blood supply
Portal system
Veins drain -> cavernous sinus
Sup and inferior- hypophysial artery
Pharyngeal Pouch
III- Inf parathyroid, thymus
Iv- Superior thyroid and parafollicular cells
II- Ear, palatine tonsils
I- Auditory/ Eustachian tube
Parathyroid
Sup and Inf, thryoid art.
C cells contain granules- PTH
Thyroid
Venous
Sup and middle veins-> internal jugular
inferior -> brachiocephalic vein
Arterial
External carotid -> superior
subclavian-> thyrocervical -> inf. thryoid
thyroid primordium
Follicular cells surrounded by epithelial
Colloid cells storage
Parafollicular cells/C cells