Research-related image 1
![](https://mb.cision.com/Public/206/3924498/85c64c2ac17c80d0_800x800ar.jpg)
Photographer: Christian Göritz lab, Karolinska Institutet
Cross-section images of a flaccid (left) and erect (right) mouse penis. The fibroblasts investigated in this study are depicted in red. The central green fibers represent the smooth muscle cells in the corpora cavernosa.