Why is the left lung narrower than the right lung? a. Liver ...

[fagboi]

Why is the left lung narrower than the right lung?
 
  a. Liver compresses the left lung.
  b. Mediastinal organs push laterally into the left hemithorax.
  c. There is poorer blood flow during fetal development.
  d. There is upward pressure of the abdominal contents.

Question 2

What will most commonly blunt the costophrenic angle as seen on chest radiograph in an upright individual?
 
  a. Air
  b. Bile
  c. Excess fluids
  d. Liver on the right, intestines on the left

[Galvarado142]

Answer to Question 1

ANS: B
The organs within the mediastinum bulge into the left hemithorax, resulting in a narrower and slightly smaller left lung.

Answer to Question 2

ANS: C
Excess fluids between the visceral and parietal pleura tend to pool here in an upright individual. This causes the angle to appear blunted or flattened to 90 degrees when viewed in the chest ra-diograph.