The most accurate statement is Inclusion and exclusion criteria are always needed in some form.
Inclusion criteria are the prospective subjects characteristics that should be taken into consideration in the study.
Exclusion criteria are set of predefined definitions commonly used to identify subjects who will not be included or those characteristics that disqualify prospective subjects for the study to be included
The answer is C. using your head
Blood in the pulmonary vein is oxygen rich, while in all of the other veins, it is oxygen poor.
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A diet that has an adequate iron intake is essential for Erythropoiesis.
