Final answer:
The hormonal product of the testis is testosterone, a steroid hormone essential for male reproductive development and secondary sexual characteristics.
Step-by-step explanation:
The hormonal product of the testis is testosterone. Testosterone is a steroid hormone produced by the Leydig cells, also known as interstitial cells, which are located between the seminiferous tubules in the testes. This hormone plays a crucial role in the development of the male reproductive system, the maturation of sperm cells, and in male secondary sexual characteristics such as deepened voice, body hair, and increased muscle mass. Testosterone is also involved in the production of inhibin, a peptide hormone that regulates the secretion of follicle-stimulating hormone (FSH) from the anterior pituitary.