Peripheral resistance refers to the resistance encountered by blood flow in the smaller arteries and arterioles of the circulatory system. It plays a crucial role in regulating blood pressure and flow, as it determines how much force is needed by the heart to pump blood through the vascular system. Changes in peripheral resistance can lead to significant cardiovascular conditions, including hypertension and atherosclerosis, by affecting the overall workload on the heart and altering blood flow dynamics.
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