You will be given a definition of a task first, then some input of the task.
You are given a sentence and your task is to generate another sentence that supports the given input.

The pulmonary arteries carry oxygen-poor blood from the heart to the lungs, and the pulmonary veins transport oxygen-rich blood from the lungs to the heart.
Output:
After the blood in the pulmonary capillaries becomes saturated with oxygen, it leaves the lungs and travels to the heart.