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WorksheetsLesson 3: Human Body systems - Circulatory system
Total questions: 25
Worksheet time: 13mins
What is the main function of the circulatory system?
Digest food
Remove waste
Transport blood, oxygen, and nutrients
Help in movement
What is the primary organ of the circulatory system?
Heart
Brain
Lungs
Kidneys
How many chambers does the human heart have?
Two
Six
Four
Five
Which chambers receive blood in the heart?
Ventricles
Atria
Valves
Capillaries
What is the name of the muscle found only in the heart?
Smooth muscle
Skeletal muscle
Cardiac muscle
Voluntary muscle
What does the right atrium do?
Receives oxygenated blood
Receives blood with carbon dioxide
Pumps blood to the body
Sends blood to the left ventricle
Where does the right ventricle pump blood?
To the body
To the lungs
To the brain
To the left atrium
What replaces carbon dioxide in the lungs?
Hydrogen
Oxygen
Plasma
Nutrients
Which chamber receives oxygen-rich blood from the lungs?
Right atrium
Left atrium
Right ventricle
Aorta
Where does the left ventricle send blood?
To the lungs
To the body
To the right atrium
To the brain
What is the function of heart valves?
Mix blood types
Pump blood faster
Keep blood flowing in one direction
Slow down blood flow
Which vessels carry blood away from the heart?
Veins
Arteries
Capillaries
Valves
Which vessels carry blood toward the heart?
Veins
Arteries
Capillaries
Ventricles
Which vessels are responsible for gas and nutrient exchange?
Arteries
Veins
Capillaries
Valves
Which blood vessel has the thickest wall?
Vein
Artery
Capillary
Aorta
Which blood vessel contains valves to prevent backflow?
Artery
Vein
Capillary
Plasma
What is the function of red blood cells?
Fight infections
Help clot blood
Carry oxygen and carbon dioxide
Clean the blood
What is the role of white blood cells?
Fight diseases and protect the body
Transport oxygen
Help blood flow
Carry nutrients
What do platelets do?
Carry hormones
Destroy bacteria
Help blood clot at injury sites
Provide oxygen to the heart
What is plasma?
Solid part of blood
Straw-colored liquid part of blood
Blood sugar
Type of white cell
Which component makes up the majority of your blood?
Platelets
Plasma
Red blood cells
White blood cells
What happens to blood in a centrifuge?
It mixes together
It disappears
It separates into components by weight
It turns into plasma
Where does gas exchange occur in the body?
Arteries
Capillaries
Heart
Veins
Why are artery walls thick and muscular?
To absorb oxygen
To withstand high pressure from the heart
To store blood
To reduce speed of flow
What is the correct path of blood circulation starting from the body?
Lungs → Heart → Body
Heart → Body → Lungs
Body → Right heart → Lungs → Left heart → Body
Brain → Heart → Body → Lungs
