Systems & Functions – Grade 3 Time Started: Time Finished: Indicate Which organ system Will be primarily used in the following situation. Write the beginning letter of correct organ system on the blank.
M S U muscular skeletal urinary D R digestive respiratory C N circulatory nervous Prepare for a Skim run and eat lots of carbohydrates like rice to give you more energy.
You lift your feet and move your legs as fast as you can, But you have to go to the bathroom because you drank too much water before the run. Your breathing is getting faster and faster. Ouch! You accidentally tripped and scraped your knee. Good thing you have strong bones to protect you.
The heart is pumping fast as you sprint for the final I km. Congratulations! You have won the race!
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