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