hilum of lung
英[ˈhailəm ɔv lʌŋ]美[ˈhaɪləm ʌv lʌŋ]
Above and behind the cardiac impression is a triangular depression named the hilum, where the structures which form the root of the lung enter and leave the viscus. These include the pulmonary artery, superiormost on the left lung, the superior and inferior pulmonary veins, lymphatic vessels and the bronchus, with bronchial veins and bronchial arteries surrounding it.