Biology of Blood

This was such a fun experiment! We talked about the “ingredients” that make up our blood. We used the following picture to illustrate our ingredients:


Blood Components: 

  1. Water bottle
  2. Yellow and Red food coloring
  3. Cheerios
  4. Mini marshmallows
  5. Salt
  6. Purple Pom-poms

Place one cup of Cheerios in a ziplock bag, add 8-10 drops of red food coloring and shake to disperse the food coloring. The Cheerios do not need to be completely covered.

Remove the label from a water bottle, fill 1/2  way with water and add 2-3 drops of yellow food coloring. This depicts our bloods first ingredient: Plasma. Plasma is blood’s liquid portion; it helps the other ingredients flow through our veins as the heart pumps.  

Next, add a sprinkle of salt into the water bottle. Blood is comprised of salt and other chemicals which make your muscles and heart function…heart vitamins!

But what makes our blood look red? Billions of red blood cells that look like Cheerios carry oxygen in the center of the “O” all over the body…”O” for oxygen. There are so many red blood cells that they make our blood appear completely red. 

Add the Cheerios with the red food coloring to your water bottle, and it will turn your yellow plasma red.

Next, there are white blood cells, which are a little bigger than our red blood cells. I connected the idea of a doctor’s white coat to white blood cells. The job of our white blood cells is to fight germs and disease, just as doctor’s job is to help keep us healthy.

Illustrate white blood cells by adding a few mini marshmallows to the water bottle.

Our final “ingredient” is the platelets. Platelets stop bleeding when we get cuts and scrapes. They have lots of little arms that hold on tight to create a barrier at our injury site. Platelets are the body’s band aids. 

Add some purple Pom poms (platelets) to the water bottle.

Finally, it’s time for the heart to do its job …to pump your blood and all of its important ingredients throughout your body! 

Rock the bottle back and forth to observe how all of these essential ingredients work together!


    One Response

    1. Thanks This is an awesome way of teaching it

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