Explanation:
systemic and pulmonary circulation differ from each other because the pulmonary circulation is part of the circulatory system responsible for forming a circuit of vessels that transport blood between the heart and lungs, and systemic circulation, on the other hand, forms a closed circuit between the heart and the rest of the body.
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A. Fewer valence electrons
Valence electrons are electrons that are held most loosely in the outermost shell.
Air is the most simplest mixture of gas and gas. It contains oxygen, CO2, nitrogen, etc.
