For science this half term, Year 6 are studying the circulatory system. So far, we have made a working lung from balloons, straws and a plastic bottle. However, today we had lots of gruesome fun making blood.
We used a plastic bottle to represent the blood vessel. Blood is made up of both solids and liquids. We added water to the bottle and then yellow food colouring. The liquid part of blood contains water and protein. This is called plasma! Plasma is the yellowish liquid portion of the blood that contains electrolytes, nutrients and vitamins and hormones as well as red blood cells, white blood cells and platelets.
Then we mixed together Cheerios with red food colouring to represent red blood cells which we added to the plasma. Red blood cells carry oxygen from your lungs to your heart, and then to your muscles. They also help to remove the carbon dioxide from the body.
To represent the white blood cells, we used mini marshmallows. White blood cells are part of the immune system; they protect the body from infections.
Finally, we added little purple sweets to represent platelets. Platelets help the blood to clot if you get a cut.
The result was fantastic; the children can’t wait to bring their bottles home! Hopefully, this will have inspired some of the children to pursue a career in medicine! Next week, we will be looking at how nutrients and water are transported around the body.