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ETM Cardiac Cycle

Cardio Respiratory System for Exercise to Music Qualification

QuestionAnswer
How many chambers does the heart consist of? What are their names? 1. Two Upper Atria 2. Two Lower Ventricles
What is the term used to describe the cardiac muscle? 1. Myocardium
What do coronary arteries do? 1. Supply blood to the myocardium
Give a simple explanation of what Atria do? 1. Receive blood from the body or lungs
Give a simple explanation of what Ventricles do? 1. Pump blood to the body or lungs
Which veins supply blood to the right atria? The superior and inferior vena cava return deoxygenated blood from the body to the right atria
Which veins supply blood to the left atria? The Pulmonary veins supply oxygenated blood from the lungs to the left atria.
What happens when the right ventricle contracts? Deoxygenated blood is pumped to the lungs through the pulmonary artery.
What happens when the left ventricle contracts? Oxygenated blood is pumped around the body through the aorta (the largest artery in the body).
What is different about the left and right ventricle? The left ventricle has a thicker muscle wall which enables it to contract more forcefully than the right, pushing blood around the body. With training the walls can increase in size (cardiac hypertrophy).
Define 'stroke volume' Stroke volume is the amount of blood pumped by a ventricle per beat.
Define 'cardiac output' Cardiac output is the amount of blood pumped out by the ventricles in one minute. It is calculated by multiplying the stroke volume by the heart rate.
What is the impact of exercise on your stroke volume and resting heart rate? With endurance training the stroke volume increases and the heart rate decreases. That is the cardiac output can be maintained with fewer beats.
Define the 2 phases of the cardiac cycle 1. Systole: contraction of the heart causes a volume of blood to be pumped to the arteries. 2. Diastole: the heart relaxes and blood flows into the heart from the veins.
Created by: 508872840
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