Cardiovascular System Functions Flashcards

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What is the main function of the cardiovascular system?

To move blood so oxygen and nutrients reach cells and waste is removed.

Which blood cells carry oxygen to working muscles?

Red blood cells carry oxygen using haemoglobin.

Which nutrient does the cardiovascular system deliver to muscles for energy?

Glucose (sugar) is carried in the blood to the muscles.

What waste gas does the cardiovascular system remove from muscles?

Carbon dioxide, carried in the blood to the lungs to be breathed out.

How does the cardiovascular system help control body temperature during exercise?

It moves warm blood to the skin, so heat is lost and core stays near 37°C.

What is vasodilation?

Blood vessels widen, increasing blood flow to the skin to help cool the body.

What is vasoconstriction?

Blood vessels narrow, reducing skin blood flow to keep heat in the body.

How does the cardiovascular system stop bleeding after a cut?

Platelets make a clot that seals the wound and stops blood loss.

Which blood cells protect the body from infection?

White blood cells fight germs to protect the body.

What does plasma do in the cardiovascular system?

It is the liquid that carries cells, nutrients, carbon dioxide, and heat.

What is the vascular shunt during exercise?

Blood is redistributed: more goes to working muscles and less to non-essential areas.

What is the role of capillaries in the cardiovascular system?

They are tiny vessels where oxygen and nutrients move into cells and wastes leave.