Circulatory System Challenge 2024 - L1

1 What is the circulatory system?

• The body's breathing system
• The body's system of nerves
• The body's food-processing system
• The body's blood-transporting system

2 What is the organ that pumps blood all throughout the human body?

• The lungs
• The heart
• The kidneys
• The blood vessels and capillaries

3 What part of the blood carries minerals, vitamins, sugar, and other foods to the body's cells?

• Plasma
• Blood Components
• Platelets
• Red blood cells
• White blood cells

4 Why does blood turn dark red as it circulates through the body?

• It starts to clot
• It gets old and dirty flowing through the body
• The oxygen in it is replaced with carbon dioxide
• The farther blood is from the heart, the more dark red it is.

5 Why is blood that flows from the lungs to the heart bright red rather than dark red?

• Oxygen makes it bright red
• Carbon dioxide makes it bright red
• Gastric juices produce the red colour of the blood
• The lungs add a pigment (dye) to blood as it flows through them.

6 What happens to blood when it is pumped into the thin-walled blood vessels of the lungs?

• Platelets are exchanged for plasma
• Carbon dioxide is replaced with oxygen
• Blood fills the lungs and causes coughing
• Nothing -- the lungs are just a place blood goes through
• on its way back to the heart.

7 What is the main job of the red blood cells in the blood?

• To clot blood
• To fight disease
• To transport oxygen to the body's cells and carry away carbon dioxide from the cells
• To transport carbon dioxide to the body's cells and carry away oxygen from the cells

8 Which of the following can best be compared to soldiers?

• Lungs
• Capillaries
• Red blood cells
• White blood cells

9 What is the function of the blood vessels and capillaries?

• They pump blood to the heart
• They filter impurities from the blood
• They carry blood to all parts of the body
• They carry messages from the brain to the muscles.

10 Which type of blood vessels carries blood away from the heart?

• Veins
• Arteries
• Capillaries
• Arteries, veins and capillaries