Very high power TEM of an expanding stage 3 embryo in vitro showing details of a mitochondria within a trophoblast cell (original magnification x35,000). Mitochondria are highly elongated with well-defined transverse cristae.
L = lysosome
Z = zona pellucida
From: Sathananthan and Trounson, 2000
Keywords: cristae, lysosome(s), mitochondria within trophoblast cell, trophoblast cells, zona pellucida
Source: The Virtual Human Embryo.