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Figure 5-29.
(A) Transverse section of adult medaka testis. (B) Magnified image of the testicular tissue shown in A (position indicated with a box). ED, efferent duct; SC, spermatocytes; SG, spermatogonia; SM, spermatozoa; ST, spermatids; arrow, interstitial cells; large arrowhead, boundary of seminiferous tubules; small arrowhead, nucleus of a Sertoli cell.