ch 18 extra pt 1

What is the function of the chordae tendinae? a. They anchor the atrioventricular valves and prevent them from opening backward. b. They help to prevent backflow of blood into the ventricles from the aorta and pulmonary trunk. c. They anchor the semilunar valves and prevent them from opening backward. d. They help the walls of the ventricle to pump blood out of the heart.

a. They anchor the atrioventricular valves and prevent them from opening backward.

This is the main artery leaving the heart.

aorta

This is the name given to the inner lining of the heart chambers

endocardium

These are sometimes known as the receiving chambers.

atria

These are the superior chambers of the heart

atria

The function of the atrioventricular valves is to _. a. prevent the flow of blood from the aorta into the ventricles b. prevent the flow of blood from the pulmonary trunk into the ventricles c. prevent the flow of blood from the ventricles into the atria d. prevent flow of blood from the atria into the ventricles

c. prevent the flow of blood from the ventricles into the atria

The function of the fluid within the pericardial sac is to _. a. provide oxygen and nutrients to the heart muscle b. keep the chambers of the heart from leaking blood into the chest cavity c. provide a relatively frictionless environment for the beating heart d. keep the tissues of the heart together

c. provide a relatively frictionless environment for the beating heart

The structures that prevent the AV valves from flipping open backwards

chordae tendinae

This network provides oxygen and other nutrients to the heart muscle.

coronary arteries

What is the name of the valve that prevents blood from backflowing into the left ventricle a. pulmonary semilunar valve b. bicuspid valve c. tricuspid valve d. aortic semilunar valve

d. aortic semilunar valve

This is another name for cardiac muscle.

myocardium

The name given to the "pumps" of the heart.

ventricles

These are the inferior chambers of the heart

ventricles