Final answer:
The seminiferous tubules contain both Sertoli cells, which support and nurture developing sperm cells, and Leydig cells, which produce testosterone. These cells are essential for the proper function of spermatogenesis in the male reproductive system.
Step-by-step explanation:
The cells within the seminiferous tubules include Sertoli cells and germ cells, but not interstitial cells or Leydig cells. The correct answer to the question is d) Both b and c.
Sertoli cells, also known as sustentacular cells or sustentocytes, provide support to the germ cells and are essential for the process of spermatogenesis. These cells extend from the basement membrane to the lumen of the seminiferous tubules, creating a blood-testis barrier that protects germ cells and assists in the production of sperm. On the other hand, Leydig cells, which are a type of interstitial cell, are located in the spaces between seminiferous tubules and are responsible for the production of testosterone, a hormone crucial for the development and maturation of sperm.