Put the structural components provided in the order that an oxygen molecule travels by matching them with numbers 1-5.  (Not all structures will be used.) Left ventricle, aorta, left atrium, right ventricle, right ventricle, alveolus, cell, right atrium

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A:

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Hematology

Hematology is the branch of biology. Hematology is the medical field that deals with the treatment of blood disorders and cancers, such as hemophilia, leukemia, lymphoma, and sickle-cell anemia. Hematologists and hematopathologists are medical professionals who specialize in illnesses of the blood and its components.