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Chapter 14

Blood Flow of the Heart Chapter 14

QuestionAnswer
Step 1 blood flow The right atrium receives deoxygenated blood returning from the body through the superior and inferior vena cavae.
Step 2 blood flow Once the right atrium is full it contracts. This forces the tricuspid valve to open and blood flows into the right ventricle. when the right ventricle is full the tricuspid valve snaps closed to prevent blood from flowing backward into the atria.
Step 3 blood flow After filling the right ventricle contracts forcing the pulmonary valve open.Blood is pumped into the right and left pulmonary arteries and onto the lungs After the right ventricle empties the pulmonary valve closes to prevent the blood from flowing backw
Step 4 blood flow After replenishing its supply of oxygen (and cleansing itself of carbon dioxide) in the lungs, the blood enters the pulmonary veins and returns to the heart through the left atrium
Step 5 blood flow When the left atrium is full it contracts. This forces the mitral, or bicuspid valve open and blood is pumped into the left ventricle
Step 6 blood flow When the left ventricle is full the mitral valve closes to prevent backflow. The ventricle then contracts forcing the aortic valve to open allowing blood into the aorta From there oxygenated blood is distributed to every organ in the body.
Created by: kayley911