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Circulatory Quiz 2

Heart wall, chambers, vessels, arteries, valves, cardiac muscle, electr evnts

QuestionAnswer
What is the visceral layer of the serous pericardium called? Epicardium
What is the name of the cardiac muscle and what is its function? Myocardium; responsible for pumping action of the heart
What is the function of endocardium? Lines myocardium and covers valves for smooth blood flow in a friction-less environment
How many chambers are in the heart? 4
What are the receiving chambers of the heart called? Atria
What is the name of the structure that separates the 2 atria? Interatrial septum
What is the fossa ovalis? A remnant of foramen ovale, an opening between left and right atria in the fetus.
What is the purpose of foramen ovale in the developing fetus? The foramen ovale allows blood flow to bipass lungs because the fetus does not need to breathe. It closes at birth.
What is an auricle and what is its purpose? A hollow appendage on the anterior surface that increases volume of the atria when needed.
What are the muscles in the auricles and the anterior wall of the right atrium that help to pull atria back to normal size after using auricles? Pectinate Muscles
What are ventricles? The 2 pumping chambers of the heart
Why is the left ventricle's muscle wall thicker than the right? The left ventricle has to pump blood to the entire body while the right ventricle only pumps blood to the lungs.
What is the structure that divides the 2 ventricles called? Interventricular septum
What are raised bundles of muscle fibers on the walls of the ventricles called? Trabeculae carneae
What are sulci? External grooves that house blood vessels and adipose tissue.
Where is the coronary sulcus? Between the atria and ventricles
Where are the anterior and posterior interventricular sulci located? Between the ventricles on the anterior and posterior of the heart
Created by: kcurtis1990