![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Continuous capillary
This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x
![Capillaries <p>This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-5a-1-ping.png)
Capillaries
This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x
![- Endothelial cell nuclei <p>This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-5a-2-ping.png)
- Endothelial cell nuclei
This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x
![Red blood cells <p>This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-5a-3-ping.png)
Red blood cells
This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x
![Air spaces <p>This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-5a-4-ping.png)
Air spaces
This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x
![- Epithelial cell <p>This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x</p>](https://digitalhistology.org/wp-content/uploads/2017/07/Or.CV_.V.Caps-5a-5-ping.png)
- Epithelial cell
This electron micrograph shows the capillaries displayed in the previous light micrograph. Note their extremely thin walls, consisting mostly of the endothelial cell, which facilitates the exchange of respiratory gases between inhaled air in the air spaces and the blood stream. The air spaces are lined by a thin epithelial cell layer that covers the exterior of the capillaries. 10,000x