Endocrine System 2 Flashcards
Location of Thyroid Gland
Mediastinum –> inferior to the cartilage of larynx
Thyroid Cartilage of Larynx
Adams apple
Thyroid Gland 2 lobes
left and right connected by the isthmus wrap around the predominantly made up of thyroid follicles
isthmus of thyroid gland
connects 2 loves of thyroid gland
Trachea
Tube wind pipe / rings of hyalin cartilage / incomplete c shape / runs behind the esophagus
Pyramidal lobe of thyroid gland
only some people have it extends up from the isthmus superiorly
Thyroid follicles
little round sac like structures / each sac has an exterior + inferior storage area microscope / millions all packed together
T thyrocyte
Exterior wall / When stimulated by TSH (Thyroid stimulating hormone) produces thyroid hormones T3 and T4
T3
triiodothyronine
T4
tetraiodothyronine
Thyroglobulin TGB
inferior storage / stored space inside the follicle required for synthesis of t3 and t4
C thyrocytes
located between follicles however sometime located within walls produce hormone called calcitonin
CT
Reduces blood calcium / inhibits osteoclast activity
4 functions
- oxygen use 2. basal metabolic rate 3. cellular metabolism 4. growth and development
Hypothyroidism
under secretion of thyroid hormones + genetic disorder