Ch. 11: The Cardiovascular System

The pointed, inferior portion of the heart, known as the ________, rests on the diaphragm and is oriented toward the left hip.

apex

What large blood vessels carry blood away from the heart?

arteries

The two superior receiving chambers of the heart are known as the ________, while the two inferior discharging chambers of the heart are known as the ________.

atria; ventricles

What are the tiny white cords that anchor the cusps or flaps of endocardium to the walls of the ventricles?

chordae tendinae

Cardiac output is the product of which two variables?

heart rate and stroke volume

What structure divides the left ventricle from the right ventricle?

interventricular septum

The walls of the ___ are substantially thicker because that chamber acts as the more powerful systemic pump of the heart.

left ventricle

The heart is situated within the medial section of the thoracic cavity known as the ___.

mediastinum

What is the muscular layer of the heart wall?

myocardium

The transportation of blood from the right side of the heart to the lungs and back to the left side of the heart is known as ____ circulation.

pulmonary

Which of the following is often called the pacemaker of the heart?

sinoatrial (SA) node

Which one of the following represents the correct path for the transmission of an impulse in the intrinsic conduction system of the heart?

sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle (bundle of His), right and left bundle branches, Purkinje fibers

Which valve is located between the right atrium and right ventricle?

tricuspid valve

The correct sequence of layers of a typical blood vessel, from superficial to deep, are ___.

tunica externa, tunica media, tunica intima

Large veins have ___ to prevent the backflow of blood.

valves