The left ventricle must contract with more force in order to send blood to the body's extremities
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Answer:
Major organs involved in the digestive system include the mouth, stomach, small intestine, large ... When it reaches your stomach, a sphincter opens and dumps the food in. ... To move into the small intestine, chyme must pass through the pyloric sphincter. From here it enters the duodenum, the first part of the small intestine.
Explanation:
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Vein because they have valves to prevent back flow of blood.
