Thyroid and Parathyroid Flashcards
Thyroid relation to trachea
Anterior to trachea
Thyroid relation to trachea
Anterior to trachea
Trachea relation to Larynx
Inferiorr
Trachea relation to Larynx
Inferiorr
Thyroid Location
between the vertebral level of C5 T1 and between the
cartilage and the 6th tracheal ring.
Isthmus location
opposite the 1st to 2nd tracheal rings.
What strap muscles overlie the thyroid gland?
Sternothyroid and Sternohyoid
Name the two nerves that supply the muscles of the vocal cords
Recurrent Laryngeal
Superior Laryngeal
Recurrent laryngeal nerve runs
between trachea and oesophagus
Superior laryngeal nerve runs
alongside superior thyroid artery. Supplies cricothyroid
Superior laryngeal nerve runs
alongside superior thyroid artery. Supplies cricothyroid
From which major artery in the neck does the superior thyroid artery arise?
ECA
From which artery does the inferior thyroid artery arise?
Subclavian
From which artery does the inferior thyroid artery arise?
Subclavian
Into which vein does the superior thyroid vein drain?
Internal Jugular
Into which vein does the middle thyroid vein drain?
Internal Jugular
Into which vein does the inferior thyroid vein drain?
Brachiocephalic Vein
Most lymph vessels from the thyroid gland drain into the
Deep Cervical Nodes
What type of cell do you see lining the follicle of Thyroid Gland
Follicular Simple Cuboidal
What colour does the colloid stain
Pink
What hormones does the thyroid gland secrete
T3 – Triiodothyronine and T4 Thyroxine
The parathyroid glands lie on the medial half of the posterior surface of each thyroid lobe, external to the
Thyroid Fibrous Capsule
The superior parathyroids are situated at the level of the
Inferior Border of Cricoid Cartilage
Arterial supply to both superior and inferior parathyroids is predominantly from the
Inferior Thyroid Arteries
Venous drainage for parathyroids is via the veins draining the
thyroid to the internal jugular veins
What kind of cells can be seen in parathyroid histology
Chief and Oxyphil
What cells does Parathyroid Hormone act upon and what is their subsequent action
It increases the action of osteoclasts (bone re-modelling) which increases plasma calcium levels
