Page 19 - 新思维科学活动用书8 样章

1 Respiration

1.5 Blood

Exercise 1.5A The components of blood

Focus
In this exercise, you will think about the three components that make up blood.

Human blood has three components:
• plasma
• red blood cells

• white blood cells.

1 Which of these three components is a liquid?

2 Which of these three components has nuclei?

3 Which component performs each of these functions?

a transporting oxygen from the lungs to all the respiring cells in the body

b protecting against pathogens that have got into the body

c transporting blood cells, nutrients and carbon dioxide

18