This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
The suppoing cells of the testes are the following? 
Select and explain. 
A. Spermatogonia, B. Leydig cells of testes, C. Cells of Seoli, D. Spermatids
C: Cells of Seoli
Answer: C: Cells of Seoli 
Explanation: All cells of the spermatogenic lineage are closely associated with the extended surfaces of Seoli cells and depend on them for metabolic and physical suppo. Each Seoli cell suppos 30 to 50 developing germ cells. Impoant in Seoli cell function are elaborate tight occluding junctions between their basolateral membranes that form a blood-testis barrier within the seminiferous epithelium.