Вопрос № 190708 - Английский язык

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Hemoglobin is the key element in the red blood cell. It is a complex protein that requires iron for its formation. Oxygen picked up in the lungs during the circulation of the blood combines loosely with hemoglobin. Then, in every part of the body where it is needed for cell metabolism, oxygen is released by the hemoglobin, which picks up carbon dioxide on the return journey to the heart and lungs.
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Hemoglobin in the blood carries oxygen from the respiratory organs to …

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Among the many specific functions of the blood are the following: it transfers oxygen and carbon dioxide between the lungs and the body cells; it carries from the digestive system the nutriments that cells need and gets rid of their waste products via the kidneys and other organs of excretion; it conveys hormones; it helps regulate body temperature; it provides substances that fight off infection.
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