This high magnification
image of a section of the seminiferous tubule of the testis stained with hematoxylin
and eosin. The darkly stained elongated structures are the heads of
spermatozoa, from which extend long flagella
(arrow) into the lumen of the tubule. Note that the sperm heads stain more
darkly that the nearby nuclei because the chromatin
in the sperm heads is much more condensed.
