For a patient standing upright, in which region of the lung is the PAO2 greatest?

This image is from an autopsy lung from a 34 yo male.  Which of the following is the most likely underlying disorder in this patient?

1. Choose the correct word from the word box (5)   Click on the blue button below to open the image   Click on the blue button above to open the word box    

3.1. Around 2500 1. A.D./B.C, the people who built and used Stonehenge probably lived at Durrington Walls (1)

9.3.  How did the war start? (1)

2.5 Name one reason why so many Roman women died at the age of thirty? Name any one reason. (1)

A 17-year-old female visited the clinic complaining of shortness of breath. She had a history of frequent infections during childhood. Physical examination revealed that respiratory sounds were absent in the left hemithorax. Routine blood and biochemical test values were within normal limits. Chest radiography revealed that mediastinal structures, trachea, and heart were deviated to the left and the right hemidiaphragm was elevated (see figure). Abnormal development of which of the following best explains the clinical findings in this patient? 

A 36 yo woman is in a motor vehicle accident and suffers both a chest injury and severe blood loss, due to the severing of her left arm. She survives, but on the 3rd hospital day her PaO2 drops significantly and her chest radiograph shows complete white-out. A lung biopsy reveals the following:  The most likely diagnosis is:

4.3.  flint (1) [answ1]

  3.2.  Over 38,000 discarded animal 2. bones/food have been found there (1)