Cardiovascular Health
1. What is the main function of the heart?
To digest food
To pump blood throughout the body
To produce oxygen
To break down nutrients
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2. Which chamber pumps oxygenated blood to the body?
Right atrium
Right ventricle
Left atrium
Left ventricle
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3. Which blood vessels carry blood away from the heart?
Arteries
Veins
Capillaries
Alveoli
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4. Which blood vessels usually carry blood back to the heart?
Arteries
Capillaries
Veins
Bronchi
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5. What is the largest artery in the body?
Pulmonary artery
Aorta
Vena cava
Coronary vein
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6. Which side of the heart receives oxygen-poor blood from the body?
Right side
Left side
Both sides equally
Neither side
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7. Which chamber receives oxygen-rich blood from the lungs?
Right atrium
Right ventricle
Left atrium
Left ventricle
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8. Which chamber pumps blood to the lungs?
Left ventricle
Right ventricle
Left atrium
Right atrium
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9. What do red blood cells mainly transport?
Hormones only
Digestive enzymes
Nerve signals
Oxygen
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10. What protein in red blood cells binds oxygen?
Hemoglobin
Insulin
Collagen
Keratin
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11. Which blood vessels are the smallest?
Arteries
Veins
Capillaries
Aortas
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12. What happens mainly in capillaries?
Food is digested
Gases and nutrients are exchanged with tissues
Urine is produced
Bones are formed
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13. What is blood pressure?
The amount of oxygen in the lungs
The number of red blood cells
The speed of digestion
The force of blood against blood vessel walls
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14. What is a pulse?
The rhythmic expansion of arteries caused by heartbeats
The movement of food through the stomach
The exchange of gases in the lungs
The movement of joints
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15. What does heart rate measure?
Blood oxygen level
Blood volume
Number of heartbeats per minute
Number of breaths per minute
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16. What are the coronary arteries responsible for supplying?
The lungs
The heart muscle
The stomach
The kidneys
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17. What separates the right and left sides of the heart?
A valve only
The aorta
A coronary artery
The septum
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18. What is the purpose of heart valves?
To prevent blood from flowing backward
To produce blood cells
To digest fats
To create oxygen
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19. Which vessels carry oxygen-rich blood from the lungs to the heart?
Pulmonary arteries
Coronary arteries
Pulmonary veins
Venae cavae
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20. Which vessels carry oxygen-poor blood from the heart to the lungs?
Pulmonary veins
Pulmonary arteries
Aorta
Coronary veins
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21. What is the liquid portion of blood called?
Plasma
Platelet
Hemoglobin
Lymph node
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22. Which blood cells help fight infections?
Red blood cells
Platelets
Plasma cells only
White blood cells
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23. What is the main role of platelets?
Carry oxygen
Help blood clot
Produce hormones
Destroy bone tissue
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24. Which structure normally acts as the heart's natural pacemaker?
Aorta
Septum
Sinoatrial node
Vena cava
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25. What is systolic blood pressure?
Pressure when the ventricles contract
Pressure when the heart is completely inactive
Oxygen pressure inside the lungs
Pressure inside the stomach
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26. What is diastolic blood pressure?
Pressure during ventricular contraction
Pressure inside the lungs
Pressure in the stomach after eating
Pressure when the ventricles relax
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27. What can regular aerobic exercise generally help improve?
Tooth enamel production
Cardiovascular fitness
Eye color
Fingerprint patterns
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28. Which condition involves a buildup of plaque inside arteries?
Asthma
Osteoporosis
Atherosclerosis
Appendicitis
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29. A heart attack usually occurs when blood flow to part of the heart muscle is blocked. Which vessels are commonly involved?
Coronary arteries
Pulmonary veins
Jugular veins
Renal veins
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30. Which lifestyle habit can help support cardiovascular health?
Avoiding all physical activity
Smoking regularly
Eating only highly processed foods
Exercising regularly and eating a balanced diet
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