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Titans

100

1. Which type of circulatory system do mammals have?
A) Single circulatory system
B) Double circulatory system
C) Open circulatory system
D) No circulatory system

1. B (Double circulatory system)

200

4. Which chamber of the heart has the thickest muscular wall?
A) Left atrium
B) Right atrium
C) Left ventricle
D) Right ventricle

C) Left ventricle

300

7. Which blood vessel carries blood away from the heart?
A) Vein
B) Capillary
C) Artery
D) Vena cava

C) Artery

400

Which part of the blood transports dissolved carbon dioxide and nutrients?
A) Plasma
B) Red blood cells
C) Platelets
D) White blood cells

A) Plasma

500

1. Yesterday, which place did the students visit in Jinan with Ms. Lara on science trip?
A) Baotu Spring
B) Daming Lake
C) Thousand Buddha Mountain
D) Black Tiger Spring

B) Daming Lake

Blaze

100

2. In a double circulatory system, where does blood go after leaving the right side of the heart?
A) To the body
B) To the lungs
C) To the brain
D) To the liver

1. B (To the lungs)

200

5. What is the function of the valves in the heart?
A) To pump blood
B) To prevent the backflow of blood
C) To produce blood cells
D) To separate oxygenated and deoxygenated blood

B) To prevent the backflow of blood

300

8. Which blood vessel has walls that are only one cell thick to allow for easy exchange of materials?
A) Artery
B) Vein
C) Capillary
D) Aorta

C) Capillary

400

Which component of blood is responsible for blood clotting?
A) Red blood cells
B) White blood cells
C) Platelets
D) Plasma

C) Platelets

500

When blood clots, what does soluble fibrinogen turn into?
A) Insoluble fibrin
B) Platelets
C) Plasma
D) Haemoglobin

A) Insoluble fibrin

Stellar

100

3. How many chambers does the human heart have?
A) 2
B) 3
C) 4
D) 5

C) 4

200

6. What is the main function of the coronary arteries?
A) To supply the lungs with blood
B) To supply the heart muscle with oxygen and nutrients
C) To carry blood away from the heart to the body
D) To bring blood back to the hear

B) To supply the heart muscle with oxygen and nutrients

300

9. What structural feature do veins have that arteries do not?
A) Thick elastic walls
B) A small lumen
C) Valves to prevent backflow
D) A pulse

C) Valves to prevent backflow

400

What process do some white blood cells use to engulf and destroy bacteria?
A) Osmosis
B) Phagocytosis
C) Diffusion
D) Clotting

B) Phagocytosis

500

What is Ms. Lara's favorite color?

a) Red and Black

b) may be red and black

c) none of them

d) just bcd

a) Red and Black