thyroid Flashcards
thyroid anatomy: recall the anatomy and cellular structure of the thyroid gland
how many lobes does the thyroid have
2 (right and left; excluding pyramidal lobe)
what is the structure of the thyroid lobes
follicular cells surrounding a colloid
what lines the thryoid follicles
parafollicular cells
what does the colloid contain
prohormone thyroglobulin
where is the thyroid
in the neck
what shape is the thyroid
butterfly
parathyroid glands
controls Ca2+ metabolism; very different to thyroid gland; 2 present embedded in each lobe
isthmus
connects both lobes
pyramidal lobe location
“head” of butterfly; occasionally present above isthmus
size of right lobe and left lobe
right lobe is slightly larger
origin of thyroid
back of tongue
embyrology of throid gland
outpouching from pharynx floor at back of tongue; duct disappears leaving thyroid gland
adult thyroid weight
20g
vocal cord supply
left recurrent laryngeal nerve runs very close so thyroid surgery poses risk to quality of voice
problems with thyroid development
agenesis (complete absence); incomplete descent; thryoglossal cyst
