This quiz works best with JavaScript enabled. Home > Science > Biology > Circulatory System – Quiz 574 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Circulatory System Quiz 574 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which is the main organ of circulation? A) Blood. B) Heart. C) Capillaries. D) Veins. Show Answer Correct Answer: A) Blood. 2. Superior Vena Cava (SVC) A) NEED TO STUDY THIS ONE!!!!!!!!!!!. B) The branch of the vena cava of a vertebrate that brings deoxygenated blood back from the head and anterior (front) part of the body to the heart. C) The radiographic visualization of the blood vessels after injection of a radiopaque substance. D) A vein that is the largest vein in the human body; returns deoxygenated blood to the right atrium of the heart from the lower half of the body. Show Answer Correct Answer: B) The branch of the vena cava of a vertebrate that brings deoxygenated blood back from the head and anterior (front) part of the body to the heart. 3. At what structures in the lungs does the exchange of oxygen and carbon dioxide take place? A) Alveoli. B) Bronchi. C) Bronchioles. D) Trachea. Show Answer Correct Answer: A) Alveoli. 4. True or False:The heart is a conscious system that requires our full focus to keep beating. A) True. B) False. Show Answer Correct Answer: B) False. 5. Blood is poured into the right atrium through A) Vena cava. B) Pulmonary vein. C) Aorta. D) Pulmonary artery. Show Answer Correct Answer: A) Vena cava. 6. Superior is which end of the heart? A) Base. B) Apex. Show Answer Correct Answer: A) Base. 7. The heart is divide into how many chambers A) 3. B) 4. C) 6. D) 5. Show Answer Correct Answer: B) 4. 8. Which of the following is NOT a type of white blood cell? A) Neutrophil. B) Lymphocyte. C) Erythrocyte. D) Monocyte. Show Answer Correct Answer: C) Erythrocyte. 9. At the artery end of a capillary, the blood pressure is A) Higher, forcing fluids and small molecules out. B) Lower, drawing in fluids and wastes. Show Answer Correct Answer: A) Higher, forcing fluids and small molecules out. 10. Disc-shaped A) Red blood cells. B) White blood cells. C) Plasma. D) Platelets. Show Answer Correct Answer: A) Red blood cells. 11. Veins have..... A) Lungs. B) Pulse. C) Valve. D) Arteries. Show Answer Correct Answer: C) Valve. 12. The upper part of the heart is made up of two chambers called what? A) Ventricles. B) Atria. Show Answer Correct Answer: B) Atria. 13. Blood pressure is recorded as A) Hydrostatic /diastolic. B) Diastolic/ hydrostatic. C) Systolic/diastolic. D) Diastolic/systolic. Show Answer Correct Answer: C) Systolic/diastolic. 14. The systolic blood pressure represents the A) Pressure in the arteries when the ventricles contract. B) Pressure in the arteries when the heart relaxes. C) Pressure in the arteries when the atria contract. D) Expansion and recoiling of the aorta. Show Answer Correct Answer: A) Pressure in the arteries when the ventricles contract. 15. Which type of blood vessel has the thickest walls? A) Capillaries. B) Lymph vessels. C) Veins. D) Arteries. Show Answer Correct Answer: D) Arteries. 16. The tricuspid valve is located within the A) Right Aorta. B) Right Ventricle. C) Right Pulmonary Valve. D) Right Atrium. Show Answer Correct Answer: D) Right Atrium. 17. The superior vena cava and inferior vena cava are..... A) Veins. B) Arteries. C) Cells of the blood. D) No answer. Show Answer Correct Answer: A) Veins. 18. The primary function of RBCs platelets, and WBCs, respectively is A) CO2 removal, blood coagulation, microbe agglutination. B) Gas exchange, microbe destruction, building immunity. C) Oxygen transport, blood clotting, pathogen destruction. D) Hemoglobin transport, fibrin creation, antibody creation. Show Answer Correct Answer: C) Oxygen transport, blood clotting, pathogen destruction. 19. What are the tubes that carry blood away from the heart? A) Capillaries. B) Veins. C) Arteries. D) Blood tubes. Show Answer Correct Answer: C) Arteries. 20. What is the main organ of the blood circulatory system? A) Small intestine. B) Lungs. C) Heart. D) None of above. Show Answer Correct Answer: C) Heart. ← PreviousNext →Related QuizzesScience QuizzesCirculatory System Quiz 1Circulatory System Quiz 2Circulatory System Quiz 3Circulatory System Quiz 4Circulatory System Quiz 5Circulatory System Quiz 6Circulatory System Quiz 7Circulatory System Quiz 8Circulatory System Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books