Understanding the Circulatory System

The video explains the circulatory system, focusing on the heart's structure and function. It describes the double circulatory system, detailing how blood flows through the heart, lungs, and body. The heart's chambers, valves, and pacemaker cells are discussed, along with the roles of arteries and veins. The video concludes with the importance of coronary arteries in supplying the heart with oxygenated blood.

What is the primary function of the circulatory system?

• To store energy

• To digest food

• To transport oxygen and nutrients

• To produce hormones

How many distinct loops are there in the double circulatory system?

• Three

• Two

• One

• Four

Which side of the heart is actually on our right when looking at a diagram?

• Right side

• Left side

• Top side

• Bottom side

What prevents blood from flowing backward in the heart?

• Bones

• Nerves

• Valves

• Muscles

What is the role of pacemaker cells in the heart?

• To absorb nutrients

• To filter blood

• To produce electrical impulses

• To store blood

In what situation might an artificial pacemaker be used?

• When the heart is too large

• When the heart is too small

• When pacemaker cells malfunction

• When blood pressure is low

What defines an artery in the circulatory system?

• Carries blood to the heart

• Carries blood away from the heart

• Carries deoxygenated blood

• Carries oxygenated blood

Which vessel carries oxygenated blood to the heart?

• Pulmonary artery

• Pulmonary vein

• Aorta

• Vena cava

What is the function of coronary arteries?

• To supply the heart with oxygenated blood

• To remove waste from the heart

• To regulate heart rate

• To store blood

Which vessel carries deoxygenated blood away from the heart?

• Pulmonary vein

• Aorta

• Pulmonary artery

• Coronary artery