Thyroid cartilage (Pyramidal lobe, var) e Thyrohyoid s Omohyoid, superior belly ● Superior thyroid artery e Superior thyroid vein Thyroid gland Left lobe Cervical fascia, investing layer (superficial layerl Inferior thyroid veins e e Sternocleidomastoid Jugular venous arch e e Common carotid artery Common carotid plexus Phrenic nerve Scalenus anterior ● Intemal jugular vein Subclavius e o Intemal thoracic 包 o Pectoralis major costal part 裸 Left lung. superior lobe Right lung anterior border 区 Supenor c Inferior Lingula of left Panetal pleura. rior lobe Costodiaphragmatic Inferor border心包裸区