2. Stop That Bleeding You are a clinical blood technician of a hospital. You are called to the emergency room, where you find an injured teenager (Tim). His right thigh has been ripped open, and the emergency room medical team is trying to stop the flow of blood from a major artery. Four of his friends wait in the emergency room lobby to donate blood to their friend. What do you suppose doctors are doing to stop the flow of blood? Tim has B+ blood, which friend (s) can donate blood to Tim?

3. Riddi and Brianna use anti-A and anti-B serums to determine ABO blood types and RH factor. These young scientists are observing how blood clots as well.

4. After determining the blood type of the four friends, students used the chart below to determine who could donate blood to Tim.

5. All materials are neatly placed and the slide is labeled. That’s the a mark of an organized scientist!

6. Aaron puts artificial blood on the slide to determine the ABO blood group. Gus cautions Aaron not to cross contaminate samples.

7. Aaron works carefully to avoid cross contamination.

8. Emma and Brianna anxiously wait to see if the blood coagulates as Riddi adds the appropriate number of drops.

9. Emma observes a reaction with the blood and anti-A serum as Emma adds the last few drops.

10. Brianna makes precise drops as Riddi watches to see if the blood coagulates with the third serum.

11. Jordan observes Phylicia’s techniques as she completes the first slide.

12. Brianna reminds Emma to place the next drop into the well labeled “Rh factor.”

13. Team work pays off as Brianna uses the yellow anti-serum

14. Aaron takes a quick glance to observe how many drops Gus is putting into the slide.

15. Gus observes that something is happening as Aaron adds the yellow anti A serum to the slide.

16. The first investigation leading up to ABO blood groups was acid-base determination. Phylicia and Jordan make their final decision. Which liquids are acids and which one is a base liquids are bases