Chapter 18: The Cardiovascular System: The Heart (Study Module 18.01)

The vessels that carry oxygen to the myocardium are called __________. coronary veins coronary arteries aortic arteries pulmonary arteries pulmonary veins

coronary arteries

What causes the abnormal swishing or whooshing sound that is heard as blood regurgitates back into an atrium from its associated ventricle? semilunar valve closure blood turbulence aortic recoil pulmonary trunk expansion

blood turbulence

Guided by powerful signaling molecules, the human heart develops from __________. mesoderm ectoderm cardioderm endoderm

mesoderm

The endocardium is composed of __________. simple cuboidal epithelium simple squamous epithelium stratified squamous epithelium cardiac muscle cells

simple squamous epithelium

Which of the following is not a role of the pericardium? It protects the heart. It facilitates heart contraction. It prevents the heart from overfilling with blood. It anchors the heart to surrounding structures.

It facilitates heart contraction.

Match the following structure with its description: Epicardium. Inner layer of pericardium (called the visceral layer) Loosely fitting superficial part of the sac enclosing the heart Glistening white sheet of endothelium lining on the inside of the heart Thin, slippery, two-layer membrane Middle layer of the heart, composed mainly of cardiac muscle

Inner layer of pericardium (called the visceral layer)

Which is the correct sequence of layers in the heart wall, starting with the outer layer? Myocardium, pericardium, endocardium Parietal pericardium, myocardium, endocardium Endocardium, smooth muscle, epicardium Endocardium, epicardium, myocardium Epicardium, myocardium, endocardium

Epicardium, myocardium, endocardium

Match the following structure with its description: Endocardium. Inner layer of pericardium (called the visceral layer) Loosely fitting superficial part of the sac enclosing the heart Glistening white sheet of endothelium lining on the inside of the heart Thin, slippery, two-layer membrane Middle layer of the heart, composed mainly of cardiac muscle

Glistening white sheet of endothelium lining on the inside of the heart

Match the following structure with its description: Fibrous pericardium. Inner layer of pericardium (called the visceral layer) Loosely fitting superficial part of the sac enclosing the heart Glistening white sheet of endothelium lining on the inside of the heart Thin, slippery, two-layer membrane Middle layer of the heart, composed mainly of cardiac muscle

Loosely fitting superficial part of the sac enclosing the heart

Match the following structure with its description: Myocardium. Inner layer of pericardium (called the visceral layer) Loosely fitting superficial part of the sac enclosing the heart Glistening white sheet of endothelium lining on the inside of the heart Thin, slippery, two-layer membrane Middle layer of the heart, composed mainly of cardiac muscle

Middle layer of the heart, composed mainly of cardiac muscle

Which of the following statements is not true about the shape, position, and location of the heart? Approximately two-thirds of the heart is found to the left of the midline. The heart is enclosed in a double-layered sac called the pleural membrane. The heart is shaped like a cone with the base facing the right shoulder. The heart is located between the two lungs within the mediastinum.

The heart is enclosed in a double-layered sac called the pleural membrane.

Match the following structure with its description: Serous pericardium Inner layer of pericardium (called the visceral layer) Loosely fitting superficial part of the sac enclosing the heart Glistening white sheet of endothelium lining on the inside of the heart Thin, slippery, two-layer membrane Middle layer of the heart, composed mainly of cardiac muscle

Thin, slippery, two-layer membrane

What is happening during the "pause" phase when the heart is resting (relaxing)? Ventricles are contracting. Ventricles are filling. Valves are closing. Atria are contracting.

Ventricles are filling.

The lining of the heart chambers is called the __________. endocardium myocardium epicardium pericardium

endocardium

The inner lining of the fibrous pericardium is formed by the __________. myocardium parietal layer of serous pericardium pericardial cavity diaphragm endocardium epicardium

parietal layer of serous pericardium

Which of the following structures lies on the outside surface of the heart and is an integral part of the heart wall? The pericardial sac The parietal layer of serous pericardium The epicardium The fibrous pericardium

the epicardium