ENT

Question 1

Blood supply to tonsils (5 arteries)

Answer 1

Descending palatine artery - branch of maxillary artery
Ascending pharyngeal artery - branch of external carotid
Ascending palatine artery - branch of facial artery
Tonsillar artery - branch of facial artery
Dorsal lingual artery - branch of lingual artery

Maxillary, facial and lingual arteries are all branches of the external carotid artery

Question 2

Little’s area of the nose (5 arteries)

Answer 2

Anterior ethmoid artery - branch of ophthalmic artery
Posterior ethmoid artery - branch of ophthalmic artery
Sphenopalatine artery - branch of maxillary artery
Greater palatine artery - branch of maxillary artery
Superior labial artery - branch of facial artery

Ophthalmic artery - branch of internal carotid artery
Maxillary artery - branch of external carotid artery
Facial artery - branch of external carotid artery

Question 3

Blood supply of thyroid

Answer 3

Superior thyroid artery - 1st branch of external carotid
Inferior thyroid artery - branch of thyrocervical trunk

Superior, middle and inferior thyroid veins

Thyrocervical trunk - branch of subclavian artery

Question 4

Nerve supply of thyroid

Answer 4

Parasympathetic innervation - vagus nerve

Sympathetic innervation - fibres from superior, middle and inferior cervical ganglia of the sympathetic trunk