KINE 1020 Lecture Notes - Lecture 9: Bronchiole, Asthma, Trachea
27 Feb 2017
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Lecture 9, cardiorespiratory physiology and cardiovascular disease, january 30th. Veins are blue, arteries are red: blue indicates deoxygenated, red indicates oxygenated. Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium. Ecg: the electrical signal starts at the sa node, which is the pacemaker of the heart. That electricity goes from the sa, to the atria, to the middle of the heart, down to the apex. How does the heart contract (graph) starting with ecg: the p wave is indicative of the atria depolarizing, which causes those atria to constrict: that constriction of the atria will push blood into the ventricles, increasing their volume. The re ective wave is the pressure that travels back to the heart, after the pressure gets too high and the blood cant go forward anymore.
