Page 35 - 新思维科学学生用书8 样章

1 Respiration

Activity 1.5.1

Making a picture of blood
You are going to make a picture of some blood, as it might look if you saw it through

a microscope. Work as a pair, or in a small group.

You will need:
• sheet of plain paper • some red card • some white card • scissors • glue

Method
1 Use the red card to make some red blood cells. Think about how many you
need to make.

2 Use the white card to make some white blood cells. Use a pen or pencil to draw
a nucleus in each one. Think about how many you need to make.
3 Stick the red blood cells and white blood cells onto the white paper. The white
paper can represent the blood plasma.

4 Write labels to stick onto the paper. Remember to label the blood plasma.

Questions
4 Copy and complete this table.

Component of blood Appearance Function

red blood cell

white blood cell

plasma

5 Name three things that are transported in blood plasma.

Summary checklist

I can describe what blood plasma is, and its function.

I can explain how red blood cells, containing haemoglobin, transport oxygen.
I can explain how white blood cells help to protect us against pathogens.

34