![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Active fibroblast
The cytoplasm of an active fibroblast is resolved better with the electron microscope. This cell has a euchromatic nucleus with a prominent nucleolus. The cell is surrounded by abundant collagen fibrils that are cut in both longitudinal and cross section. 8000x
![Fibroblast nucleus <p>The cytoplasm of an active fibroblast is resolved better with the electron microscope. This cell has a euchromatic nucleus with a prominent nucleolus. The cell is surrounded by abundant collagen fibrils that are cut in both longitudinal and cross section. 8000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-4-1-ping.png)
Fibroblast nucleus
The cytoplasm of an active fibroblast is resolved better with the electron microscope. This cell has a euchromatic nucleus with a prominent nucleolus. The cell is surrounded by abundant collagen fibrils that are cut in both longitudinal and cross section. 8000x
![Nucleolus <p>The cytoplasm of an active fibroblast is resolved better with the electron microscope. This cell has a euchromatic nucleus with a prominent nucleolus. The cell is surrounded by abundant collagen fibrils that are cut in both longitudinal and cross section. 8000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-4-2-ping.png)
Nucleolus
The cytoplasm of an active fibroblast is resolved better with the electron microscope. This cell has a euchromatic nucleus with a prominent nucleolus. The cell is surrounded by abundant collagen fibrils that are cut in both longitudinal and cross section. 8000x
![Collagen fibrils - longitudinal section <p>The cytoplasm of an active fibroblast is resolved better with the electron microscope. This cell has a euchromatic nucleus with a prominent nucleolus. The cell is surrounded by abundant collagen fibrils that are cut in both longitudinal and cross section. 8000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-4-3-ping.png)
Collagen fibrils - longitudinal section
The cytoplasm of an active fibroblast is resolved better with the electron microscope. This cell has a euchromatic nucleus with a prominent nucleolus. The cell is surrounded by abundant collagen fibrils that are cut in both longitudinal and cross section. 8000x
![Collagen fibrils - cross section <p>The cytoplasm of an active fibroblast is resolved better with the electron microscope. This cell has a euchromatic nucleus with a prominent nucleolus. The cell is surrounded by abundant collagen fibrils that are cut in both longitudinal and cross section. 8000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-4-4-ping.png)
Collagen fibrils - cross section
The cytoplasm of an active fibroblast is resolved better with the electron microscope. This cell has a euchromatic nucleus with a prominent nucleolus. The cell is surrounded by abundant collagen fibrils that are cut in both longitudinal and cross section. 8000x