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Fig. 9-1, p. 242

Lungs

Pulmonary

capillaries

Pulmonarycirculation

Right

side

of

heart

Left

side

of

heart

Systemic

circulation

Organ

systems

= O2-rich blood

= O2-poor blood

Pulmonary

veins

Pulmonary

arteries

Systemic

arteries

Systemic

capillaries

Systemic

veins

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Fig. 9-2b, p. 243

Venae cavaeRight

atriumRight

ventricle

Pulmonary artery

Other

systemic

organsBrain

Digestive

tractKidneys Muscles

Systemic

circulation

Pulmonary

circulationLungs

Left

ventricle

Left

atriumAorta Pulmonary veins

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Fig. 9-2c, p. 243

Right

ventricular wall

Leftventricular

wall

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Fig. 9-3, p. 244

When pressure is

greater behind the

valve, it opens.

When pressure is greater

in front of the valve, it

closes. Note that when

pressure is greater in

front of the valve, itdoes not open in the

opposite direction; that

is, it is a one-way valve.

Valve opened

Valve closed; does not open in opposite direction

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Fig. 9-4a, p. 245

Aorta

Superior vena cava

Pulmonary valve

Pulmonary veins

Right atrium

Right AV valve

Right ventricle

Inferior vena cava

Pulmonary artery

Pulmonary veins

Left atrium

Left AV valve

Aortic valve

Chordae tendineae

Papillary muscle

Left ventricle

Interventricular septum

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Fig. 9-4b, p. 245

Right AV valve

Left AV valve

Aortic or pulmonary valve

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Fig. 9-4c, p. 245

Right atrium

Right AV valve

Direction of

backflow ofblood

Right ventricle

Papillary muscle

Chordae tendineae

Septum

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Fig. 9-4d, p. 245

Direction of backflow of blood

Aorta

Leakproof

seam

Aortic

valve

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Fig. 9-7, p. 247

Sinoatrial

(SA) node

Right

atrium

Internodal

pathway

Right

branch

of bundle

of His Right

ventricle Purkinje

fibers

Left

ventricle

Left

branch

of bundle

of His

Left

atrium

Atrioventricular

(AV) node

Interatrial

pathway

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Fig. 9-9, p. 250

Interatrial pathway

Right atrium Left atrium

SA node

Internodal

pathway

AV node

Purkinje

fibers

Right ventricle Left ventricle

Bundleof His