ACTIVITY 3 : PRACTICE ATLAS internal heart chambers anterior view chapter 19

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Last updated 3:10 AM on 1/21/26

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5 Terms

1

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Interventricular septum

Location:

Heart ventricles

Description:

Thick, muscular, inferior part of partition separating right and left ventricles
Forms majority of interventricular septum

2

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Left atrium

Location:

Heart

Description:

One of four heart chambers
Thin, smooth wall
Receives four pulmonary veins
Internal features include interatrial septum

Comment:

Forms most of base of heart
Separated from left ventricle by left atrioventricular (bicuspid or mitral) valve
Only its auricle seen in anterior view of heart

<p>Location:</p><ul><li><p>Heart</p></li></ul><p>Description:</p><ul><li><p>One of four heart chambers</p></li><li><p>Thin, smooth wall</p></li><li><p>Receives four pulmonary veins</p></li><li><p>Internal features include interatrial septum</p></li></ul><p>Comment:</p><ul><li><p>Forms most of base of heart</p></li><li><p>Separated from left ventricle by left atrioventricular (bicuspid or mitral) valve</p></li><li><p>Only its auricle seen in anterior view of heart</p></li></ul><p></p>

3

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Left ventricle

Location:

Heart

Description:

One of four heart chambers
Thick, muscular walls
Internal features include papillary muscles, chordae tendineae, trabeculae carneae, interventricular septum, and aortic vestibule

Comment:

Separated from left atrium by left atrioventricular (bicuspid or mitral) valve
Separated from aorta by aortic valve
Walls twice as thick as right ventricle
Forms apex of heart
Responsible for pumping oxygen-rich blood to body (except lungs)

<p>Location:</p><ul><li><p>Heart</p></li></ul><p>Description:</p><ul><li><p>One of four heart chambers</p></li><li><p>Thick, muscular walls</p></li><li><p>Internal features include papillary muscles, chordae tendineae, trabeculae carneae, interventricular septum, and aortic vestibule</p></li></ul><p>Comment:</p><ul><li><p>Separated from left atrium by left atrioventricular (bicuspid or mitral) valve</p></li><li><p>Separated from aorta by aortic valve</p></li><li><p>Walls twice as thick as right ventricle</p></li><li><p>Forms apex of heart</p></li><li><p>Responsible for pumping oxygen-rich blood to body (except lungs)</p></li></ul><p></p>

4

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Right atrium

Location:

Heart

Description:

One of four heart chambers
Thin, smooth, posterior wall
Thin, rough anterior wall (pectinate muscles)
Receives superior and inferior venae cavae and coronary sinus
Internal features include interatrial septum, fossa ovalis, and crista terminalis

Comment:

Forms right surface of heart
Separated from right ventricle by atrioventricular (tricuspid) valve

<p>Location:</p><ul><li><p>Heart</p></li></ul><p>Description:</p><ul><li><p>One of four heart chambers</p></li><li><p>Thin, smooth, posterior wall</p></li><li><p>Thin, rough anterior wall (pectinate muscles)</p></li><li><p>Receives superior and inferior venae cavae and coronary sinus</p></li><li><p>Internal features include interatrial septum, fossa ovalis, and crista terminalis</p></li></ul><p>Comment:</p><ul><li><p>Forms right surface of heart</p></li><li><p>Separated from right ventricle by atrioventricular (tricuspid) valve</p></li></ul><p></p>

5

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Right ventricle

Location:

Heart

Description:

One of four heart chambers
Rough, muscular walls (trabeculae carneae)
Muscle wall thicker than either atrium, and thinner than left ventricle
Internal features include papillary muscles, chordae tendineae, interventricular septum, and conus arteriosus

Comment: