★ Digestion Quiz
What is the purpose of Iron?
A. Transport oxygen to the cells, blood cell formation, etc.
B. Produce thyroid hormones
C. When a person consumes too many calories.
Select your answer:

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Defence against Infectious Diseases › Viewthe totality of all the chemical processes in an organism, consisting of anabolic and catabolic mechanisms.
A. Metabolism
B. Mucous membranes
C. Pathogen
Respiratory System › View
Label C is…
A. Trachea
B. Diagphragm
C. Bronchus
D. Alveolus