Heart

What is the primary function of the heart?

• Pumping air to the lungs
• Providing nutrients to muscles
• Digesting food
• Pumping blood through the blood vessels

What happens during diastole in the cardiac cycle?

• Atria contract
• The heart is in a state of relaxation
• Blood is pumped out of the heart
• Ventricles contract

What is the inherent property of cardiac muscle mentioned in the text?

• Flexibility
• Elasticity
• Strength
• Rhythmicity

What is the outermost layer of the pericardium called?

• Fibrous pericardium
• Parietal layer
• Visceral layer
• Inner serous pericardium

How is the heart described in terms of its shape?

• Cube-shaped
• Cylindrical
• Hollow, muscular, cone-shaped
• Spherical

The majority of the heart is located in the right half of the thoracic cavity.

• True
• False

The heart is approximately the size of a person's fist.

• True

• False

There are three atria in the human heart.

• False
• True

The pulmonary veins carry venous blood from the lungs to the heart.

• True
• False

The aorta arises from the right ventricle.

• False
• True