Blood travels in one direction through two loops linked by the heart. The shorter loop takes blood to the lungs, where it collects oxygen before returning to the heart. The blood then goes around the second, longer, loop, delivering oxygen around the body before returning to the heart again.
Pattern of blood flow
- In the first loop, the blood travels from the heart to lungs and then back to the heart.
- In the second loop, the blood is pumped from the heart throughout the body and then returns again to the heart.
- The heart is really two pumps, one on the right and one on the left.
- Blood travels in only one direction.
Picture Credit : Google