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Figure

Coronal sections of the heart (a) showing the connection between the right ventricle and the pulmonary trunk and (b) showing the connection between the left ventricle and the aorta.

Pulmonary And Aortic Fibrous Rings

Figure 15.7

Photograph of a human tricuspid valve

Right atrium

Cusps of tricuspid valve

Chordae tendineae

Interventricular septum

Papillary muscles

Muscular ridges

Figure 15.7

Photograph of a human tricuspid valve

Pulmonary And Aortic Fibrous Rings

Photograph of the pulmonary and aortic valves of the heart (superior view). Figure 15.9 labels the valves as seen in this photograph.

Pulmonary valve

Opening of coronary artery

Bicuspid valve

Fibrous skeleton

Figure 15.9

The skeleton of the heart consists of fibrous rings to which the heart valves are attached (superior view).

Aortic valve

Tricuspid valve

Valves of the Heart

Valve

Location

Function

Tricuspid valve

Right atrioventricular orifice

Prevents blood from moving from right ventricle into right atrium during ventricular contraction

Pulmonary valve

Entrance to pulmonary trunk

Prevents blood from moving from pulmonary trunk into right ventricle during ventricular relaxation

Bicuspid (mitral) valve

Left atrioventricular orifice

Prevents blood from moving from left ventricle into left atrium during ventricular contraction

Aortic valve

Entrance to aorta

Prevents blood from moving from aorta into left ventricle during ventricular relaxation

Posterior o

Figure 15.9

The skeleton of the heart consists of fibrous rings to which the heart valves are attached (superior view).

Superior vena cava

Tissue cells

Pulmonary artery

Alveolar capillaries

Superior vena cava

Tissue cells

Pulmonary artery

Alveolar capillaries

Pulmonary And Aortic Fibrous Rings

Alveolar capillaries

Right atrium Pulmonary valve Tricuspid valve Inferior vena cava

Left atrium Bicuspid valve Aortic valve Left ventricle Right ventricle Aorta

Tissue cells

Figure

The right ventricle forces blood to the lungs, whereas the left ventricle forces blood to all other body parts. (Structures are not drawn to scale.)

Right atrium Pulmonary valve Tricuspid valve Inferior vena cava

Alveolar capillaries

Left atrium Bicuspid valve Aortic valve Left ventricle Right ventricle Aorta

Tissue cells

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