The video explains the relationship between exercise and heart rate, highlighting how the heart pumps blood faster to supply oxygen to the body. It describes the circulatory system, detailing the roles of arteries, veins, and the heart's chambers and valves. The video also covers the anatomy of the heart and the importance of oxygen in fueling the body during physical activity.

Why does Jimmy want to become a hero in his school?

• By organizing an event

• By scoring high in exams

• By winning a race

• By helping his friends

What happens to the heart rate when you exercise?

• It remains the same

• It decreases

• It doubles

• It triples

What does the body need more of during exercise?

• Rest

• Food

• Water

• Oxygen

How does the heart supply oxygen to the body?

• Directly from the air

• By absorbing it from food

• Through the lungs

• By mixing oxygen with blood

What is the function of the heart in the circulatory system?

• To produce energy

• To pump blood

• To digest food

• To store oxygen

What are the red and blue lines in the human body called?

• Nerves and muscles

• Arteries and veins

• Bones and tissues

• Cells and fibers

What is the approximate weight of a human heart?

• 200 grams

• 500 grams

• 300 grams

• 400 grams

How many chambers does the human heart have?

• Five

• Four

• Three

• Two

What happens when the heart valves open and close?

• The heart stops

• Blood is pumped

• The heart grows

• Oxygen is produced

Which side of the heart receives oxygen-poor blood?

• Right side

• Left side

• Both sides

• Neither side