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WorksheetsUnderstanding the Circulatory System
Total questions: 15
Worksheet time: 8mins
What is the main organ of the circulatory system?
heart
liver
kidneys
lungs
What do arteries carry away from the heart?
Oxygenated blood
Carbon dioxide
Deoxygenated blood
Nutrients
What type of blood do veins carry back to the heart?
Nutrient-rich blood
Carbon dioxide-rich blood
Oxygenated blood
Deoxygenated blood
What are the tiny blood vessels called that connect arteries and veins?
Venules
Arteries
Capillaries
Veins
What is the term for blood that is rich in oxygen?
Oxygenated blood
Nutrient-rich blood
Carbonated blood
Deoxygenated blood
What is the term for blood that has less oxygen?
Carbonated blood
Deoxygenated blood
Oxygenated blood
Nutrient-rich blood
How does the heart rate change during exercise?
The heart rate decreases during exercise to conserve energy.
The heart rate remains constant regardless of exercise intensity.
The heart rate only increases during high-intensity workouts.
The heart rate increases during exercise to supply more oxygen to the muscles.
What is the function of capillaries in the circulatory system?
Capillaries store excess blood for later use.
The function of capillaries is to enable the exchange of substances between blood and tissues.
Capillaries are responsible for pumping blood throughout the body.
Capillaries transport oxygen from the lungs to the heart.
Which blood vessels have thick walls?
Capillaries
Veins
Arteries
Venules
Which type of blood vessels are primarily responsible for carrying blood back to the heart?
Arteries
Veins
Capillaries
Aorta
What is the role of the heart in the circulatory system?
The heart stores excess nutrients for later use.
The heart pumps blood, facilitating circulation of oxygen and nutrients in the body.
The heart produces hormones for digestion.
The heart filters waste from the blood.
How many chambers does the human heart have?
3
5
4
2
Which artery is responsible for carrying oxygenated blood from the heart to the rest of the body?
pulmonary artery
aorta
subclavian artery
carotid artery
What happens to blood in the lungs?
Blood becomes oxygenated in the lungs.
Blood loses carbon dioxide in the lungs.
Blood is filtered in the lungs.
Blood is stored in the lungs.
What is the purpose of the circulatory system?
To transport blood and essential substances throughout the body.
To digest food and absorb nutrients.
To provide structural support to the body.
To facilitate breathing and gas exchange.
