WELL 175 Lecture Notes - Lecture 11: Endothelium, Systolic Geometry, Aorta
28 Dec 2016
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Chapter 3: cardiorespiratory endurance: basic physiology of cardiorespiratory endurance exercise, the cardiorespiratory system. Cardiorespiratory system: the system that circulates blood through the body; consists of the heart, blood vessels, and respiratory system (lungs) Circulates blood, which transports oxygen, nutrients, and other key substances to the organs and tissues that need them. It also helps to carry away waste products: the heart. The heart is a four-chambered, fist-sized muscle located just beneath the sternum (breastbone) Right side: pumps oxygen-poor blood to the lungs through pulmonary circulation: the part of the circulatory system that moves blood between the heart and the lungs; controlled by the right side of the heart. Periods of the heart: systole: contraction of the heart, the atria contracts first, pumping blood into the ventricles, diastole: relaxation of the heart, blood is pumped out into the body, then flows back into the heart.
