White blood cell

High school (ages 12+)
Human Body

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/white-blood-cell

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the scientific name?Leukocyte
2. What is the primary origin?Hematopoietic stem cells in bone marrow
3. What are white blood cells and why do we need them?White blood cells are tiny superheroes that travel through your body to fight germs and keep you healthy. They help stop infections before they can make you sick.
4. How do white blood cells find and attack germs?They move out of the blood into tissues, follow chemical signals from germs, and then either swallow the germs or release special chemicals to kill them.

Hematopoiesis: The process of forming all blood cells, including leukocytes.
Extravasation: The movement of leukocytes from blood vessels into tissues.
Antigen Presentation: The process by which immune cells display antigens to T cells.