Page 730 - Fundamentals of anatomy physiology

Chapter 20 The Heart 717

Figure 20–6 The Sectional Anatomy of the Heart. Left common carotid artery

Brachiocephalic Left subclavian artery
trunk Ligamentum arteriosum

Superior Aortic arch Pulmonary trunk
vena cava Left
Pulmonary valve
Right atrium
pulmonary Left pulmonary
arteries
arteries
Left pulmonary
Ascending aorta veins

Fossa ovalis Interatrial septum
Aortic valve
Opening of Cusp of left AV
coronary sinus (mitral) valve

Right atrium Left ventricle
Pectinate muscles

Conus arteriosus

Cusp of right AV Interventricular
(tricuspid) valve septum

Chordae tendineae Trabeculae
carneae
Papillary muscles
Moderator band
Right ventricle
Inferior vena cava

b The papillary muscles and chordae tendineae Descending aorta
support the right AV (tricuspid) valve. The
photograph was taken from inside the right a A diagrammatic frontal section through the heart, showing 20
ventricle, looking toward a light shining from
the right atrium.

major landmarks and the path of blood flow (marked by arrows)

Left subclavian artery through the atria, ventricles, and associated vessels.
Left common carotid artery

Brachiocephalic trunk

Superior vena cava Pulmonary
Ascending aorta trunk

Cusp of
pulmonary valve

Auricle of left atrium

Right atrium Cusp of left AV
(bicuspid) valve
Cusps of right AV
(tricuspid) valve Chordae tendineae
Papillary muscles
Left ventricle

Trabeculae carneae Interventricular
septum
Right ventricle

c Anterior view of a frontally sectioned
heart showing internal features and valves.