Lesson 18 of 21
Checkpoint: leaf, air, blood and kidney
Show on a big screenA plant stands in sunlight with potassium hydroxide in its jar. What does the leaf lack?
A leaf closes its pores on a dry day. What does this save?
Air flows into your lungs. What has the diaphragm done?
Why does oxygen pass easily from an alveolus into the blood?
A cut stops bleeding after a while. Which tiny cell pieces plug the cut?
Blood has just left the heart under high pressure. Which tube is it in?
The kidneys filter about 180 L a day. What happens to most of it?
0 of 7 answered
Seven ideas, checked.
Finish the checkpoint to complete this lesson — you can always retry for a better score.