Blood Strucure and Function (Justin Dillon)
Title: What does our blood do?
Principle(s) Investigated: Students will investigate how the structures within our blood are used for various different functions.
Student prior knowledge: Students already understand that blood circulates throughout our body via the pumping mechanism of the heart and goes to various organs and structures in our bodies.
Explanation: This learning segment provides the students with an opportunity to have hands-on interaction with a model of the blood. The corn syrup represents plasma, the red candies represent blood cells, the mini marshmallow represents a white blood cell, and the sprinkles represent platelets as well as other nutrients.
- White blood cells are predominantly involved in fighting infections and participating in inflammatory reactions.
- Red blood cells carry oxygen to the body.
- Platelets help stop bleeding.
Standards:
Students who demonstrate understanding can:
MS-LS1-3.
Use argument supported by evidence for how the body is a system of interacting subsystems composed of groups of cells. [Clarification Statement: Emphasis is on the conceptual understanding that cells form tissues and tissues form organs specialized for particular body functions. Examples could include the interaction of subsystems within a system and the normal functioning of those systems.] [Assessment Boundary: Assessment does not include the mechanism of one body system independent of others. Assessment is limited to the circulatory, excretory, digestive, respiratory, muscular, and nervous systems.]
Science and Engineering Practices
Disciplinary Core Ideas
Crosscutting Concepts
Materials: Canola oil, Cinnamon Imperials candy, mini marshmallows, sprinkles, 250 mL beaker, measuring cup.
Procedure:
1. Pour a little more than 1/4 cup of canola oil into the 250 mL beaker.
2. Add a little less than 1/4 cup of red candies into the 250 mL beaker.
3. Add 1 mini marshmallow to the 250 mL beaker.
4. Add a teaspoon of sprinkles to the 250 mL beaker.
5. Stir until ingredients are evenly distributed.
Questions & Answers:
When would you need more white blood cells?
What part of your blood is important when you get injured?
What happens to white blood cells when you get sick?
Applications to Everyday Life:
Every living thing requires blood to circulate through the body in order to supply nutrients and oxygen to our organs and tissues.
Blood donations are always in short supply at hospitals worldwide. Donating blood is a great way to help others that need whole blood, red blood cells, platelets, as well as plasma.
Haemophilia A and B
Low white blood cell count
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https://www.myjoyfilledlife.com/components-blood-activity-kids/
https://www.redcrossblood.org/donate-blood/how-to-donate/types-of-blood-donations.html