Therapeutic Effect of Stem Cells on Male Infertility in a Rat Model: Histological, Molecular, Biochemical, and Functional Study

Figure 5

Electron micrographs of a seminiferous tubule of a control rat. (a) Normal basement membrane (BM), the myoid cell with the flat nucleus (MC), mitochondria (M), type A and B spermatogonia, and primary spermatocyte (PS). (b) Sertoli cell (SC), mitochondria (M), and smooth endoplasmic reticulum (sER) (arrowhead). (c) Early spermatid (ES), apical acrosomal cap (arrow), and peripheral mitochondria (arrowhead). (d) Cross section in mature sperms inside the tubule lumen having a central axoneme surrounded by outer dense fibres and fibrous sheath. (e) Interstitial tissue with blood capillary (C), Leydig cells (LC), large open-face nucleus (N), mitochondria (M), and lipid droplets (L) ((a)–(c): TEM, ×2000; (d): ×6000; and (e): ×3000).

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