Let’s go step by step to understand how blood flows through the heart using this diagram.
First, look at where blood enters the heart:
- “Blood from body” comes into the
right atrium (top right chamber).
- Then it goes down through a
valve into the
right ventricle (bottom right chamber).
- From there, it gets pumped out to the lungs — that’s labeled “Blood to lung”.
Now, after the blood picks up oxygen in the lungs, it comes back:
- “Blood from lung” enters the
left atrium (top left chamber).
- It goes down through another
valve into the
left ventricle (bottom left chamber).
- The left ventricle is strong and pumps the oxygen-rich blood out through the
aorta to the rest of the body — that’s “Blood to body”.
Also notice:
- The
septum is the wall between the left and right sides — it keeps oxygen-poor and oxygen-rich blood from mixing.
- Arrows show direction: blue arrows = low-oxygen blood; red arrows = high-oxygen blood.
So the full path is:
Body → Right Atrium → Right Ventricle → Lungs → Left Atrium → Left Ventricle → Body
This loop happens over and over — it’s called circulation!
Final Answer:
Blood flows from the body into the right atrium, then to the right ventricle, which sends it to the lungs. After picking up oxygen, it returns to the left atrium, moves to the left ventricle, and is pumped out to the body through the aorta.
Parent Tip: Review the logic above to help your child master the concept of parts of the heart worksheet.
