Understanding the Cardiovascular System

What is the primary function of the cardiovascular system?

• To digest food

• To circulate blood throughout the body

• To control body temperature

• To produce hormones

Which of the following is a correct method to estimate your maximum heart rate?

What is the purpose of heart rate zones in exercise?

• To determine the best time to eat

• To measure the intensity of a workout

• To calculate body mass index

• To track sleep patterns

How many chambers are in the heart?

• one

• 2

• three

• 4

In which direction does blood flow through the heart?

• Right atrium → Right ventricle → Lungs → Left atrium → Left ventricle

• Left atrium → Left ventricle → Lungs → Right atrium → Right ventricle

• Right ventricle → Right atrium → Lungs → Left ventricle → Left atrium

• Left ventricle → Left atrium → Lungs → Right ventricle → Right atrium

What is the main artery that carries blood away from the heart to the rest of the body?

• Pulmonary artery

• Aorta

• Vena cava

• Coronary artery

Which of the following is NOT a heart rate zone?

• Resting zone

• Fat-burning zone

• Aerobic zone

• Sleep zone

What is the function of the valves in the heart?

• To pump blood

• To prevent backflow of blood

• To produce red blood cells

• To filter blood

What is the significance of the pulmonary artery in the circulatory system?

• It carries oxygen-rich blood to the heart

• It carries oxygen-poor blood to the lungs

• It carries nutrients to the cells

• It carries waste products to the kidneys

What do red blood cells do?

• carries oxygen

• fights infection

• clots blood

• nothing; the white blood cells do all the work