![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Pulmonary artery
Several profiles of a pulmonary artery can be seen accompanying this transition of a terminal bronchiole to a respiratory bronchiole. 100x
![Terminal bronchiole <p>Several profiles of a pulmonary artery can be seen accompanying this transition of a terminal bronchiole to a respiratory bronchiole. 100x </p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.B.P.03.P01.png)
Terminal bronchiole
Several profiles of a pulmonary artery can be seen accompanying this transition of a terminal bronchiole to a respiratory bronchiole. 100x
![Respiratory bronchiole <p>Several profiles of a pulmonary artery can be seen accompanying this transition of a terminal bronchiole to a respiratory bronchiole. 100x </p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.B.P.03.P02.png)
Respiratory bronchiole
Several profiles of a pulmonary artery can be seen accompanying this transition of a terminal bronchiole to a respiratory bronchiole. 100x
![Pulmonary artery <p>Several profiles of a pulmonary artery can be seen accompanying this transition of a terminal bronchiole to a respiratory bronchiole. 100x </p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.B.P.03.P03.png)
Pulmonary artery
Several profiles of a pulmonary artery can be seen accompanying this transition of a terminal bronchiole to a respiratory bronchiole. 100x
![Macrophages <p>Several profiles of a pulmonary artery can be seen accompanying this transition of a terminal bronchiole to a respiratory bronchiole. 100x </p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.B.P.03.P04.png)
Macrophages
Several profiles of a pulmonary artery can be seen accompanying this transition of a terminal bronchiole to a respiratory bronchiole. 100x