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Inner most layer of tissue in the heart.

• Pericardium

• Endocardium

• Myocardium

• Epicardium

Chamber where the blood goes before it is pumped into the pulomary circulation.

• Left atrium

• Right ventricle

• Left ventricle

• Right atrium

Contraction of heart muscle

inner layer of the pericardium

• visceral pericardium
• endocardium
• pleural pericardium
• epicardium

Muscular wall of the heart.

• Epidermis
• Endocardium
• Pericardium
• Myocardium

Prevents backflow of blood from the pulmonary trunk into the right ventricle.

• Aortic valve
• Mitral valve
• Tricuspid valve
• Semilunar valve

generates impulse causing atrial excitation

• SA node
• AV node
• Purkinje fibers
• Bundle of His

What divides the

heart longitudinally?

• Ventricle

• Atrium

• Septum
• Valves

What is the outermost layer of the heart?

• Endocardium

• Myocardium

• Pericardium

• Epidermis

Which part of the heart generates the electrical impulses that cause ventricular excitation?

• SA node

• AV node

• Purkinje fibers

• Bundle of His