Figure 1
From: Variational modularity at the cell level: insights from the sperm head of the house mouse
House mouse sperm head. (a) SEM image of the sperm head indicating the position of landmarks and semilandmarks. (b) Localization of the main regions of the sperm head: AA, anterior acrosome; ES, equatorial segment; SAR, sub-acrosomic ring; PAS, post-acrosomal sheath; VS, ventral spur. The acrosomal (APM) and post-acrosomal (PAPM) plasma membranes are shown in light and dark shading respectively. (c-e) Subsets of landmarks for hypotheses H1-H3.