Hope this helps !!!
Explanation:
Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. The pulmonary vein empties oxygen-rich blood, from the lungs into the left atrium.
Carbohydrates
Protein
Fat
Vitamins
Water
Minerals
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The statement "<span>Aristotle applied scientific principles to describe the flight of insects and birds, the movement of fish through water, and the way land animals run" is true.</span>
A. could be a hidden variable because when it gets too cold it gets icy.