Thyroid blood supply
arterial
Superior thyroid artery (br ext carotid art)
Inferior thyroid artery (subclavian → thyrocervical trunk branch)
venous drainage
superior + middle thyroid vein → IJV
inferior thyroid vein → brachiocephalic trunk
Superior thyroid artery (br ext carotid art)
Inferior thyroid artery (subclavian → thyrocervical trunk branch)
superior + middle thyroid vein → IJV
inferior thyroid vein → brachiocephalic trunk