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Detail of sperm mitochondria

Very high power TEM of a stage 1b embryo in vitro showing details of sperm mitochondria (original magnification x35,000). One sperm mitochondrion (arrow) has lost its matrix density and cristae and is probably degenerating. The sperm centriole (C) is duplicating. The morphology of most of the oocyte mitochondria has changed little.

From: Sathananthan and Trounson, 2000. Reproduced with permission of the publisher, Oxford University Press.

Keywords: cristae, oocyte mitochondria, sperm centriole , sperm mitochondria

Source: The Virtual Human Embryo.