Labelling the heart 2 features of the circulatory system that allows blood to move from the legs to heart ___

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the answer is: metamorphic rocks often show the presence of fossils, also a

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when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.