Cells alive is a web site with excellent information and interesting pictures of cells.

Click on the picture to go to Cells alive. Refer to menu on the left of their homepage.

Find answers to the questions below from the Cells alive web site.

1. Go to Immunology then Ouch.. How does the body find, kill and eat microbes?

2. Go to Microbiology then Heliobacter pylori. What causes ulcers? How are ulcers currently treated?

3. Go to Microbiology then Dividing Bacteria. Why isn't the earth covered with bacteria 100 feet deep?

4. Go to Cell Biology then How Big. Give the approximate size for bacteria, red blood cells, lymphocytes and a human sperm cell.

5.Go to Microbiology then Parasites. Describe the appearance of Giardia.