Answer: Most people are unique combinations of the three body types: Ectomorph, Mesomorph, and Endomorph. Nutritionists, exercise physiologists, and even doctors use this classification system to help design effective, individualized fitness plans.
Explanation:
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Oxygenated (arterial) blood is bright red, while dexoygenated (venous) blood is dark reddish-purple. The difference is color results from the electronic state of the iron ion (ferrous vs ferric), which in turn influences the π → π* and n → π* electronic transitions of porphyrin and hence its optical characteristics.
Hemoglobin is <span>a red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a heme group</span>
