Korotkoff : The Heart And The Sound Of The Heart

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What anatomical structure of the heart produces the "lub" and "dub" sounds? What are Korotkoff sounds? How are Korotkoff sounds different from the "lub" "dub" sounds? The heart is connected to the rest of the cardiovascular system through several large arteries and veins. The right atrium receives blood through the superior and inferior vena cava, the two largest veins of the body, while the left ventricle receives blood through the pulmonary veins. The right ventricle pumps blood through the pulmonary artery as it travels to the lungs while the left ventricle ejects the blood into the aorta, the largest artery in the body, from where it travels to the rest of the body.
Atrioventricular valves are located between the right atrium and the right ventricle, and between the left atrium and the left ventricle. These allow the blood to travel in one direction: from the atrium to the ventricles. The semilunar valves, located at the base of the pulmonary artery and the aorta, allow blood to flow to the lungs and the rest of the body, respectively, but prevent the flow back into the ventricles. Familiar "lub-dub" sounds of the heart are produced when the respective valves close after allowing blood to pass through them.
The sounds of Korotkoff are the first sound that is heard when you take the systolic blood persion, the first sound you hear when you press the artery and listen in the ear is the sound of Korotkoff and the distal pressure is where the fifth face when the sound is
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