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Order of Blood Flow

QuestionAnswer
Deoxygenated blood enters the right atrium of the heart from the superior and inferior vena cava: #1
The pacemaker of the heart, SA node (sinoatrial node) sends an electrical impulse to the left atrium and AV node: #2
The AV node sends signals to the bundle branches housed in the interventricular septum #3
The bundle branches continue to send signals to the Bundle of His and the Purkinje fibers which stimulate the right and left ventricles: #4
The right atrium contracts and moves blood through the tricuspid valve into the right ventricle: #5
The right ventricle relaxes to receive the blood from the right atrium: #6
The right ventricle contracts and moves the deoxygenated blood through the pulmonary semilunar valve: #7
The deoxygenated blood moves from the pulmonary semilunar valve through the pulmonary trunk: #8
The deoxygenated blood moves from the pulmonary trunk to the right and left pulmonary arteries: #9
The deoxygenated blood moves to the lungs and gas exchange takes place: #10
Gas exchange involves the dumping of CO₂ and waste and picking up O₂ in the alveoli of the lungs: #11
Oxygenated blood moves from the lungs through the right and left pulmonary veins: #12
Oxygenated blood moves from the pulmonary veins into the left atrium: #13
The left atrium contracts from the SA node and the bicuspid/mitral valve opens: #14
The oxygenated blood moves through the bicuspid valve into the left ventricle: #15
The left ventricle contracts and moves oxygenated blood through the aortic semilunar valve: #16
The oxygenated blood moves through the aortic trunk through the aorta and out to the rest of the body: #17
Created by: user-1990156
 

 



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