thyroid and parathyroid glands

Question 1

name the parts of thyroid gland

Answer 1

2 lateral lobes (right and left) extends from thyroid cartilage to 5th tracheal ring
midline isthmus (level of 3rd tracheal ring)
midline pyramidal lobe

Question 2

what provides arterial supply to thyroid gland

Answer 2

superior thyroid artery (1st branch of ECA)
inferior thyroid artery (branch of thyrocervical trunk from subclavian)

Question 3

what provides venous drainage from thyroid gland

Answer 3

thyroid venous plexus:
superior thyroid vein (into IJV)
middle thyroid vein (into IJV)
inferior thyroid vein (into bracheocephalic)

Question 4

what are parathyroid glands

Answer 4

2 pairs (superior and inferior) of small glands on posterior surface of thyroid

Question 5

what provides arterial supply to paraythroid glands

Answer 5

inferior thyroid artery (branch of thyrocervical trunk from subclavian)

Question 6

what provides venous drainage from parathyroid glands

Answer 6

thyroid venous plexus:
superior thyroid vein (into IJV)
middle thyroid vein (into IJV)
inferior thyroid vein (into bracheocephalic)

Question 7

what may be damaged during surgery to thyroid gland

Answer 7

recurrent laryngeal nerves (right) from CN X. symptoms of injury include hoarseness or aphonia