1) What is the primary function of the circulatory system in the human body? a) To transport blood, oxygen, and nutrients to every cell b) To digest food and produce energy c) To control body movements d) To regulate body temperature only 2) How many chambers does the human heart have and what are they called? a) Two chambers: left and right ventricles only b) Three chambers: one atrium and two ventricles c) Four chambers: left and right atrium, left and right ventricles d) Five chambers: including an extra dividing chamber 3) What role do valves in the heart play? a) They help the heart muscles contract b) They control blood flow direction and prevent backflow c) They produce blood cells d) They carry blood to the lungs 4) Which type of blood vessel carries oxygen-rich blood away from the heart? a) Arteries b) Veins c) Capillaries d) Lymph vessels 5) What is the main function of capillaries in the circulatory system? a) To carry blood directly to the heart b) To pump blood c) To store blood d) To connect arteries and veins and facilitate exchange of oxygen and nutrients 6) What does the bone marrow produce that is important to the blood? a) Haemoglobin b) Plasma c) Oxygen d) Red blood cells, white blood cells, and platelets 7) Which blood component carries oxygen and gives blood its red colour? a) White blood cells b) Red blood cells containing haemoglobin c) Platelets d) Plasma 8) What is the role of white blood cells in the circulatory system? a) To fight infection and protect the body from disease b) To carry oxygen throughout the body c) To clot blood when injured d) To carry nutrients and hormones 9) What does plasma primarily consist of and what is one of its functions? a) Mostly haemoglobin, it carries oxygen b) Mostly water, it carries proteins, nutrients, hormones, and waste c) Mostly oxygen, it transports carbon dioxide only d) Mostly platelets, it helps clot blood 10) Why does your heart beat faster when you are running or exercising? a) Because you are dehydrated b) Because blood pressure drops c) Because the heart valves open slower d) Because your body needs more oxygen 11) What are platelets responsible for in the blood? a) Carrying oxygen to body cells b) Helping blood to clot and stop bleeding c) Fighting germs and infections d) Transporting nutrients and hormones

T4.0 The Human Circulatory System

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