This week the Lively Ladybugs have been learning about the respiratory system. One thing that we learned is that our body cannot store oxygen and uses it up very quickly, which is why we have to keep breathing.
Today we did an experiment to test how fast our body uses up oxygen. We all timed ourselves to see how long we could hold our breath and we recorded the time it took until our bodies needed more oxygen. We did this test a second time, but this time before we held our breath we inhaled and exhaled very quickly many times. We found that we can hold our breath quite a lot longer after we breathe in and out right before because when we breathe quickly we are allowing more oxygen into our blood. Then when we hold our breath it takes our body longer to use up the extra oxygen we inhaled!