Over the last two weeks, we have learned all about the circulatory system and what it is made up of: blood, blood vessels and the heart. In today’s science lesson, we learned more about the three different blood vessels (arteries, veins and capillaries) and what our blood is made up of! Did you know our blood isn’t just a red liquid? It is actually made up of 4 parts: plasma, red blood cells, white blood cells and platelets.