The combination of heart, lungs, and circulatory system that ...

[Mr.Thesaxman]

The combination of heart, lungs, and circulatory system that supplies oxygen and nutrients to
  working muscles is known as the
 
  A) enteric nervous system. B) cardiorespiratory system.
  C) musculoskeletal system. D) central nervous system.

Question 2

Describe the effect on red blood cells of sickle cell anemia, thalassemia, microcytic anemia, and macrocytic
  anemia. Identify the causes of each disorder
 
  By contrast, what causes pernicious anemia and how does it
  affect the absorption of vitamin B12?
  What will be an ideal response

[fraziera112]

Answer to Question 1

B

Answer to Question 2

Answers will vary.