Structure of the Testes and Male Reproductive Tract	

	The testes contain two functional units: interstitial or Leydig cells that contain the enzymes for androgen synthesis; and a tubule network that is involved in the production and transport of sperm (Fig. 11.1). 

See later:
• Leydig Cells
• Spermatogenic Tubules and Sertoli Cells
• Other Components of the Male Reproductive Tract