ICSE Class 6 Biology - Circulatory System - Test 3 (Advanced)
1. The heartbeat is important because it:
A. Stops blood flow
B. Keeps blood circulating
C. Produces oxygen
2. Oxygen-rich blood is mainly carried by:
A. Arteries
B. Veins
C. Platelets
3. Veins mainly carry:
A. Oxygen-rich blood
B. Food only
C. Carbon dioxide-rich blood
4. Capillaries help in:
A. Pumping blood
B. Exchange of materials
C. Digestion
5. Blood pressure refers to:
A. Force of blood on vessels
B. Speed of digestion
C. Amount of oxygen in lungs
6. The chambers of the heart help in:
A. Storing food
B. Directing blood flow
C. Producing enzymes
7. Hemoglobin is found in:
A. Platelets
B. Plasma
C. Red blood cells
8. White blood cells are responsible for:
A. Defense
B. Oxygen transport
C. Blood clotting
9. Blood clotting is mainly done by:
A. RBCs
B. Platelets
C. Plasma
10. The circulatory system functions:
A. Once a day
B. Only during exercise
C. Continuously
11. Arteries carry blood under:
A. High pressure
B. No pressure
C. No flow
12. Valves in veins help to:
A. Increase oxygen
B. Prevent backflow
C. Produce blood
13. Plasma carries:
A. Only oxygen
B. Only RBCs
C. Nutrients and wastes
14. The heart is made of:
A. Muscles
B. Bones
C. Fat tissue only
15. Pulse rate shows:
A. Digestion speed
B. Heartbeat rate
C. Breathing depth
16. Capillaries connect:
A. Heart and lungs
B. Brain and stomach
C. Arteries and veins
17. Circulation helps in:
A. Transporting nutrients
B. Stopping digestion
C. Producing hormones only
18. Blood vessels form a:
A. Digestive system
B. Transport network
C. Respiratory system
19. Oxygen is important for:
A. Hair growth only
B. Bone formation only
C. Energy release
20. A healthy circulatory system is important for:
A. Overall body function
B. Only breathing
C. Only digestion