Human Circulatory System

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

• Regulating body temperature

• Producing antibodies

• Filtering waste from the blood

• Transporting oxygen to the body

Which component of blood is responsible for carrying oxygen?

• Haemoglobin

• White blood cells

• Platelets

• Plasma

What are the smallest blood vessels in the body called?

• Capillaries

• Veins

• Arteries

• Venules

What is the liquid part of blood that carries nutrients and waste products?

• Platelets

• Plasma

• Antibodies

• Haemoglobin

Which type of blood cells are responsible for fighting infections?

• Plasma

• Haemoglobin

• White blood cells

• Platelets

What is the function of red blood cells in the human body?

• Carrying oxygen

• Fighting infections

• Clotting blood

• Producing antibodies

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What is the role of platelets in the blood clotting process?

• Transporting oxygen

• Producing antibodies

• Forming clots

• Regulating body temperature

Which blood vessels carry blood back to the heart?

• Arteries

• Veins

• Capillaries

• Venules

What is the role of venules in the circulatory system?

• Transporting oxygen to the body

• Producing antibodies

• Returning blood to the heart

• Regulating body temperature

What is the function of capillaries in the circulatory system?

• Transporting oxygen to the body

• Producing antibodies

• Connecting arteries and veins

• Regulating body temperature