Testosterone is produced by which testicular cells, also known as interstitial cells?

1. Two main cell populations support testicular function: Sertoli cells (which nurture developing sperm) and another cell type located between the seminiferous tubules. 2. This second cell type synthesizes the primary male androgen. 3. These cells Leydig cells, also called interstitial cells for their location. 4. So Leydig cells, not Sertoli cells, produce testosterone. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 27 "The Reproductive System", p.1289 §Testosterone_