Exercise 27

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Major heart structures and great vessels

Coronary muscle

Arteries that supply bood to caridic muscle

Myocardium

Layer of heart wall containing cardiac muscle

auricles

Extensions of atria

Mediastinum

Heart is located here (area between the lungs)

Endocardium

Lines the heart chambers

Apex

Pointed inferior part of the heart

Ventricle

Two heart pump; lower heart chambers

Atria

Superior heart chambers

Epicardium

Another name for visceral pericardium

Base

Wide superior part of the heart

Oxygen-poor

Blood pumped by right ventirlce (oxygen-rich or oxygen-poor)

Oxygen-rich

Blood pumped by left ventricle (oxygen-rich or oxygen-poor)

Papillary muscle

Enlarged muscles in ventircles attached to chordae tendinae

Trabeculae carneae

Muscle ridges in ventricels

Pectinate muscle

Ridges in anterior wall of right atrium

Chordae tendinaea

Strings attached to AV cusp

Inferior vena cava

Blood vessels that returns blood from the bosy inferior to the heart

Mitral bicuspid

The valve located between the left ventricle and the aorta

Fossa ovalis

A membrane between the atria that closes after birth

Tricuspid valve

The valve located between the right atrium and right ventricle

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