Chapter 15 Study Guide: The Heart Size and Location

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Where is the heart located in the body?

In the abdominal cavity

Above the sternum

Between the lungs

In the mediastinum (correct)

Which part of the heart is known as the Point of Maximum Impulse?

Left ventricle

Apex (correct)

Fibrous pericardium

Base

Which layer of the heart wall is composed of cardiac muscle and performs the work of the heart?

Pericardial sac

Endocardium

Myocardium (correct)

Epicardium

How many chambers does the heart have?

Four Signup and view all the answers

What is the basic role of the left ventricle in the heart?

Pumping blood throughout the body Signup and view all the answers

Which layer of the pericardial sac surrounds the heart and forms a cavity between its two layers?

Serous pericardium Signup and view all the answers

What is the name of the valve that connects the left atrium and left ventricle?

Mitral Valve (Bicuspid Valve/Left AV Valve) Signup and view all the answers

Which valve prevents backflow from the aorta into the left ventricle?

Aortic Valve Signup and view all the answers

What is the function of the skeleton of the heart?

To keep the valves from stretching Signup and view all the answers

Where does deoxygenated blood enter the heart?

Superior Vena Cava Signup and view all the answers

Which coronary artery nourishes most of the right ventricle?

Right Coronary Artery (RCA) Signup and view all the answers

When do coronary arteries receive their supply of blood?

When the ventricles relax Signup and view all the answers

What is the structure of cardiac muscle like?

Short, fat, and branched Signup and view all the answers

Where is coronary circulation different from circulation in the rest of the body?

In arterial compression during myocardial contraction Signup and view all the answers

What is unique about the electrical characteristics of cardiac muscle?

They are only found in the heart, short, fat, and branched in structure Signup and view all the answers

What is the purpose of the Tricuspid valve?

Connects the right atrium and right ventricle Signup and view all the answers

What is the function of the tricuspid valve in the heart?

Prevents backflow from the right ventricle to the right atrium Signup and view all the answers

What is the main function of the skeleton of the heart?

To keep the valves from stretching Signup and view all the answers

Where does deoxygenated blood return to the heart?

Via the Superior Vena Cava Signup and view all the answers

Which part of the myocardium is nourished by the Right Coronary Artery (RCA)?

Inferior part of left ventricle Signup and view all the answers

When does coronary circulation primarily occur?

During myocardial contraction Signup and view all the answers

What is the unique characteristic of cardiac muscle?

Short, fat, and branched Signup and view all the answers

What is the function of the mitral valve in the heart?

Connects the left atrium and left ventricle Signup and view all the answers

What part of the heart does the Aortic Valve (Left Semilunar Valve) prevent backflow into?

Left Ventricle Signup and view all the answers

Which part of the heart does the Pulmonary Valve (Right Semilunar Valve) prevent backflow into?

Right Ventricle Signup and view all the answers

What is the main function of cardiac muscle?

To contract and pump blood throughout the circulatory system Signup and view all the answers