![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Alveolus
The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x
![Alveoli <p>The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.I.R.A.06.P01.png)
Alveoli
The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x
![Type I cell <p>The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.I.R.A.06.P03.png)
Type I cell
The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x
![Type II cell <p>The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.I.R.A.06.P02.png)
Type II cell
The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x
![Endothelial cell nuclei <p>The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.I.R.A.06.P04.png)
Endothelial cell nuclei
The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x
![Capillaries <p>The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.I.R.A.06.P05.png)
Capillaries
The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x
![Blood cells <p>The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.I.R.A.06.P06.png)
Blood cells
The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x
![Air-blood barrier <p>The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.I.R.A.06.P07.png)
Air-blood barrier
The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x
![Macrophage <p>The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/06/O.R.I.R.A.06.P08.png)
Macrophage
The components of the alveoli and the interalveolar septa are illustrated in this image. 1000x