Anatomy of the Heart

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Exercise 30 Lab Manual, pg 443

The heart is enclosed in a double-walled sac called the ___

Pericardium

____ is closely applied to the heart muscle.

epicardium

The heart is divided into how many chambers?

4 chambers

What is the name of the two RECEIVING chambers of the heart?

Left ATRIUM and right ATRIUM

The left ventricle charges blood into the _____, from which all systemic arteries of the body diverge to supply the body tissues.

aorta

TRUE OR FALSE:

Blood flows through the heart in one direction-- from the atria to the ventricles

TRUE

The right atrioventricular valve, or _____, prevents backflow into the right atrium when the right ventricle is contracting.

Atrioventricular valve is also known as the MITRAL

The heart serves as a double pump. The ___ side serves as the pulmonary circulation pump, shunting carbon dioxide-rich blood to the lungs

LEFT

The functional supply of the heart itself is provided by the _______ arteries

Coronary arteries

The major function of the cardiovascular system is:

Transportation.

Using blood as a transport vehicle, the system carries oxygen, digested food, cell wastes, electrolytes, etc. to the body's hemeostasis (balance of the body) to and from the body cells.

Which system does the following?:

Using blood as a transport vehicle, the system carries oxygen, digested food, cell wastes, electrolytes, etc. to the body's hemeostasis (balance of the body) to and from the body cells.

Cardiovascular system

Serous membrane, the outer loosely applied ______, which is attached at the heart apex to the diapragm

parietal pericardium

This fluid allows the heart to beat in a frictionless environment

Serous fluid

The serous parietal pericardium lines the loosely fitting superficial _____ composed of dense connective tissue.

Fibrous pericardium

Two microscopic features of cardiac cells that help distinguish them from other types of muscle cells are branching and ____

Intercalated discs

In the heart, the ___ ventricle has thicker walls and a basically circular cavity shape.

LEFT ventricle

Pericarditis (is the...)

Inflammation of the pericardium causes painful adhesions between the serous pericardial layers.
These adhesions interfere with heart movements.

The walls of the heart are composed primarily of cardiac muscle called _____

myocardium

Myocardium

Is the cardiac muscle that make up the walls of the heart

The ventricles and atria are lined by this thin serous endothelium called ____

endocardium

What is the function of the fluid that fills the pericardial sac?

Cushioning of the heart;

Reduce friction during heart activity.

Ventricular systole

the contraction, or period of contraction, of the heart, especially of the ventricles

the contraction, or period of contraction, of the heart, especially of the ventricles, is called ____

Ventricular systole

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