Circulatory System | Live Education Quiz

1

Which vein carries oxygenated blood?

A Inferior vena cava B Superior vena cava C Pulmonary vein D Portal vein

2

What is the name of the heart valve between the right atrium and right ventricle?

A Aortic valve B Pulmonary valve C Tricuspid valve D Mitral valve

3

What is the main function of platelets?

A Carry oxygen B Fight infections C Help in blood clotting D Transport nutrients

4

Which of the following is a blood disorder?

A Diabetes B Anemia C Asthma D Arthritis

5

Which of the following is true about capillaries?

A They allow exchange of substances B They have thick walls C They carry blood at high pressure D They have valves

6

What is the main organ of the circulatory system?

A Liver B Heart C Lungs D Kidney

7

Which vessel carries deoxygenated blood from the heart to the lungs?

A Pulmonary artery B Pulmonary vein C Aorta D Vena cava

8

Which of the following is not a type of blood vessel?

A Lymphatic B Artery C Vein D Capillary

9

Which of the following increases the risk of heart disease?

A Exercise B Balanced diet C Smoking D Adequate sleep

10

Which of the following blood types is the universal donor?

A Type A B Type B C Type AB D Type O

11

Which type of blood vessel has the thinnest walls?

A Arteries B Veins C Capillaries D Venules

12

What is the term for high blood pressure?

A Hypotension B Hypertension C Hyperglycemia D Hyperthermia

13

The muscular layer of the heart wall is called the:

A Myocardium B Endocardium C Pericardium D Epicardium

14

The sac-like membrane that surrounds the heart is called:

A Pericardium B Pleura C Peritoneum D Meninges

15

What is the function of the sinoatrial node?

A Regulate blood pressure B Initiate heartbeat C Filter blood D Carry oxygen

16

Which of the following blood vessels have valves to prevent backflow?

A Veins B Arteries C Capillaries D Arterioles

17

What is the name of the fluid that surrounds the heart?

A Pericardial fluid B Pleural fluid C Synovial fluid D Cerebrospinal fluid

18

The heart is located in which part of the chest?

A Mediastinum B Pleural cavity C Abdominal cavity D Pelvic cavity

19

What pigment gives red blood cells their color?

A Chlorophyll B Melanin C Hemoglobin D Carotene

20

The pulmonary circulation involves the flow of blood between the heart and the:

A Lungs B Liver C Kidneys D Brain

21

What is the main function of the coronary arteries?

A Supply blood to the brain B Supply blood to the heart muscle C Supply blood to the lungs D Supply blood to the kidneys

22

Which of the following is NOT a blood vessel?

A Artery B Vein C Capillary D Lymph node

23

Which chamber of the heart pumps deoxygenated blood to the lungs?

A Right atrium B Right ventricle C Left atrium D Left ventricle

24

Blood contains a pigment called hemoglobin that contains:

A Iron B Copper C Magnesium D Zinc

25

Which of the following is not a component of plasma?

A Red blood cells B Water C Proteins D Dissolved nutrients