Blood Circulation and Heart Functions

Miss Jones explains the flow of blood through the heart, focusing on the pathways of oxygenated and deoxygenated blood. She describes how deoxygenated blood enters the heart, travels to the lungs to become oxygenated, and then returns to the heart to be pumped to the rest of the body. Key anatomical structures such as the atria, ventricles, and valves are discussed, with references to textbook pages for further clarification.

Why is it important to understand the flow of blood through the heart?

• To learn about blood types

• To understand the respiratory system

• To become a doctor

• To pass upcoming exams

What color is used to represent deoxygenated blood?

• Red

• Blue

• Green

• Yellow

Where does deoxygenated blood enter the heart?

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

Through which vessels does deoxygenated blood return to the heart?

• Pulmonary arteries

• Aorta

• Superior and inferior vena cava

• Pulmonary veins

What happens to blood in the lungs?

• It changes color to blue

• It is pumped to the right atrium

• It becomes oxygenated

• It becomes deoxygenated

Which vessel carries oxygenated blood back to the heart?

• Pulmonary vein

• Pulmonary artery

• Aorta

• Superior vena cava

What is the role of the semilunar valves?

• To allow blood flow from the heart to the body

• To prevent backflow into the atria

• To prevent backflow into the ventricles

• To allow blood flow from the heart to the lungs

Through which vessel does oxygenated blood leave the heart to supply the body?

• Pulmonary artery

• Pulmonary vein

• Aorta

• Superior vena cava

What is the main function of the aorta?

• To carry deoxygenated blood to the lungs

• To carry oxygenated blood to the body

• To carry deoxygenated blood to the heart

• To carry oxygenated blood to the heart

Which part of the body does the oxygenated blood supply after leaving the heart?

• Only the brain

• Only the limbs

• All parts of the body except the lungs

• Only the lungs