Thyroid and Parathyroid

Question 1

Parts of thyroid

Answer 1

Left lobe
Right lobe
Isthmus
Pyramidal lobe

Question 2

Arterial blood supply to thyroid

Answer 2

Superior thyroid artery (branch of external carotid artery)

Inferior thyroid artery (off thyrocervial trunk)

Question 3

Venous supply to thryoid

Answer 3

Superior thyroid vein (to IJ)
Middle thyroid vein (to IJ)
Inferior thyroid vein (to brachiocephalic)

Question 4

Blood supply to parathyroid glands?

Answer 4

Inferior thyroid artery

Question 5

Embryologic structure of superior and inferior parathyroid glands

Answer 5

Superior = 4th pharyngeal pouch
Inferior = 3rd pharyngeal pouch

Question 6

Position of inferior thyroid glands?

Answer 6

Lateral and posterior to thyroid

Below inferior thyroid artery