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Put the following in chronological order:

The major development of the fetal heart is completed by the end of week _____.

  (MAYBE TOUGH, only 1pt)   An increase in the partial pressure of CO2 causes bronchioles to….  

  Which statement accurately describes alveolar and systemic gas exchanges?  

  According to Boyle’s law, the pressure of a gas ________ if the volume of its container increases.  

  When a partial pressure gradient exists for a gas, it will move from the area of its LOWER partial pressure to the area of HIGHER partial pressure.  

  Which of the following is considered a PRIMARY (not secondary) lymphoid organ?  

  Which of the following features is not common to both lymphatic vessels and circulatory veins?  

  The body replaces cells damaged by the virus with scar tissue, which is thick and stiff.  This can result in a condition called “pulmonary fibrosis”, which has been seen in people with COVID-19 and is probably more likely to develop if the lungs are severely affected by the infection.  Pulmonary fibrosis….  

  Like blood, lymph flows both to and from the heart.