Dear Norelle,

Our bodies have many living parts, like skin, muscle, brain and bones. Blood helps keep these parts alive and healthy. The system that moves our blood around the body is sort of like a city’s postal service, said my friend Astrid Suchy-Dicey.

Suchy-Dicey is a scientist at Washington State University who is really curious about blood. Her research helps people at risk for diseases.

She said it first helps to know blood is actually made up of different things: red blood cells, white blood cells, platelets, and plasma.

If you think of … Continue reading Blood: Why do we have it? Where does it come from?