MICROANATOMY

Detailed explanation-1: -(The hilum is the point of entry on each lung for the bronchus, blood vessels, and nerves.) These veins then pass to the left atrium, where their contents are poured into the heart.

Detailed explanation-2: -Other structures include the phrenic nerve, pericardiacophrenic artery and vein, and the anterior pulmonary plexus, which lie in front of each lung root, whereas the vagus nerve and posterior pulmonary plexus lies behind each lung root.

Detailed explanation-3: -Both left and right hilum contain a pulmonary artery, pulmonary veins (superior and inferior), and bronchial arteries. Also, in the left hilum, there is one bronchus, the principal bronchus, and in the right hilum, there are two bronchi, the eparterial and hyparterial bronchi.

Detailed explanation-4: -The renal arteries divide before entering the renal hilum into anterior and posterior divisions, which receive approximately 75% and 25% of the blood, respectively.