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microscopic blood vessel that carries blood between an artery and a vein, allowing the exchange of substances between the blood and interstitial fluid
circuit of blood flow that carries blood between the heart and the rest of the body
region of the heart between the right atrium and right ventricle from which electrical impulses spread to the ventricles during a heartbeat
first number of a blood pressure reading; measures the pressure on artery walls when heart ventricles contract
second number of a blood pressure reading; measurement of the pressure on artery walls when the heart is relaxed
Red blood cell
blood cell containing hemoglobin, which transports oxygen; also called an erythrocyte
White blood cell
blood cell that functions in defending the body against infections and cancer cells; also called a leukocyte
deposits of cholesterol, calcium, and fat that build up on artery walls and can lead to cardiovascular disease
condition that occurs when an artery becomes blocked, disrupting blood flow to the heart
condition of having a blood pressure of 140/90 or higher for an extended period; also called high blood pressure
flap of tissue that covers the trachea during swallowing, preventing food from entering the lungs
in some arthropods, chitin-lined air tube that forms part of the respiratory system (Concept 24.1); in humans, tube between the larynx and bronchi through which air travels to the lungs; also called the windpipe
sheet of muscle that forms the bottom wall of the chest cavity; contracts during inhaling and relaxes during exhaling
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