Bleeding

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/bleeding

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 primary hemostasis components?Vasoconstriction and platelet aggregation
2. What is the secondary hemostasis key product?Fibrin clot formation
3. Why does a scraped knee turn red and bleed?When you scrape your knee, the skin breaks and the blood vessels inside are damaged. The blood rushes out, making the area look red and sometimes forming a small clot to stop the bleeding.
4. How does your body stop bleeding after an injury?Your body uses a process called hemostasis to stop bleeding. First, the blood vessel narrows and platelets stick together to form a plug. Then a chain reaction turns a liquid protein into a solid thread called fibrin that locks the plug in place.

Hemostasis: The physiological process that stops bleeding, involving vasoconstriction, platelet plug formation, and coagulation.
Coagulation Cascade: A series of enzymatic reactions in the blood that leads to the formation of fibrin.
Fibrinolysis: The process of breaking down blood clots once they are no longer needed.