Thyroid

Question 1

Deep cervical fascia layers (3)

Answer 1

1. Investing
2. Pretracheal
3. Prevertebral

Question 2

Carotid sheath contain (3)

Answer 2

1. Common carotid art
2. IJV
3. Vagus nerve

Question 3

Arterial supply of thyroid (3)

Answer 3

1. Superior thyroid art (fr branch of ext carotid art)
2. Inferior thyroid art (fr thyrocervical trunk-subclavian art)
3. Thyroid ima (fr aortic arch)

Question 4

Venous drainage of thyroid (3)

Answer 4

1. Sup thyroid vein (to IJV)
2. Middle thyroid vein (to IJV)
3. Inferior thyroid vein (to left brachiocephalic vein)

Question 5

Lymphatic drainage of thyroid (2)

Answer 5

1. Anteriorly, around the arteries pass to prelaryngeal LV-> pretracheal LN-> paratracheal LN
2. Lateral, located around sup. thyroid vein-> inf. deep cervical vein

Question 6

Function of thyroid hormone (8)

Answer 6

1. Calorigenic action
2. Growth & development
3. nervous system (brain stimulation)
4. Metabolism (protein,CHO,lipid)
5. Heart
6. GIT (motility, appetite)
7. Gonads
8. Energy expenditure