Circulatory System Concepts

Kimmy wants to be a hero by winning a school race. The video explains how the heart beats faster during exercise to supply more oxygen to the body. It describes the circulatory system, including how the heart pumps oxygen-rich blood to the body and returns oxygen-poor blood to the lungs. The anatomy of the heart, including its chambers and valves, is discussed, along with the importance of blood donation.

What is the normal resting heart rate for an average person?

• 50 times per minute

• 110 times per minute

• 90 times per minute

• 70 times per minute

Why does the heart beat faster during exercise?

• To decrease blood pressure

• To supply more oxygen to the body

• To increase body temperature

• To reduce stress levels

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

• To store oxygen

• To pump blood throughout the body

• To digest food

• To produce red blood cells

How does oxygen-rich blood travel from the heart to the rest of the body?

• Through veins

• Through arteries

• Through capillaries

• Through lymph nodes

What are the two main types of blood vessels in the human body?

• Nerves and tendons

• Muscles and ligaments

• Capillaries and lymph nodes

• Arteries and veins

What is the size of a human heart compared to?

• A tennis ball

• A football

• A fist

• A grapefruit

How many chambers does the human heart have?

• Four

• Five

• Two

• Three

What happens to blood when it returns to the heart from the body?

• It is filled with oxygen

• It is full of carbon dioxide

• It is converted to plasma

• It is stored in the liver

What is the function of the heart valves?

• To filter impurities from the blood

• To store oxygen

• To open and close to regulate blood flow

• To produce blood cells

What is the main function of the circulatory system?

• To digest food

• To protect against infections

• To circulate blood and oxygen throughout the body

• To control body temperature