The Heart

What is the function of the circulatory system?

• Transporting oxygen-rich blood to the heart

• Supplying oxygenated blood to the upper body

• Delivering oxygen and essential nutrients to cells and tissues

• Carrying deoxygenated blood from the heart to the lungs

Which layer of the artery is responsible for acting as the protective coating for the inner layers?

• Tunica Interna/intima

• Tunica Adventitia

• Tunica Media

• Tunica Externa

What is the main function of capillaries?

• Carrying deoxygenated blood back to the heart

• Connecting arteries to veins

• Transferring oxygen and nutrients to cells

• Acting as a network of exchanges between arteries and veins

Which blood vessels carry oxygenated blood away from the heart?

• Veins

• Capillaries

• Arteries

• Venules

What is the role of the atrioventricular node in the heart's conduction system?

• Acts as the heart's pacemaker

• Delays the SA node's electrical signal

• Receives the electrical signal from the SA node

• Conducts electrical impulses to the ventricles

Which blood vessels carry blood from the right ventricle of the heart to the lungs?

• Pulmonary trunk

• Pulmonary veins

• Pulmonary arteries

• Pulmonary capillaries

What is the main function of the pulmonary circulation?

• Supplying oxygenated blood to the heart from the lungs

• Carrying deoxygenated blood from the heart to the lungs

• Transporting oxygenated blood to the upper body

• Shunting deoxygenated blood from the heart to the lungs

What is the role of the sympathetic nervous system in regulating heart rate?

• Releases hormones to accelerate the heart rate

• Delays the SA node's electrical signal

• Acts as the heart's pacemaker

• Conducts electrical impulses to the ventricles

What are the sounds generated by the beating of the heart and the flow of blood through its chambers called?

• Heart murmurs

• Heartbeats

• Heart rhythms

• Heart sounds

Which blood vessels carry deoxygenated blood back to the heart?

• Venules

• Capillaries

• Arteries

• Veins