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 Indian J Med Microbiol  
 

Figure 2: Diagrammatic representation of a mid-sagittal section through the head of a spermatozoon. The perinuclear theca (PT) is the layer between the acrosome and the nucleus. The PT can be divided into two regions: the subacrosomal layer (red) and the postacrosomal sheath (yellow).

Figure 2: Diagrammatic representation of a mid-sagittal section through the head of a spermatozoon. The perinuclear theca (PT) is the layer between the acrosome and the nucleus. The PT can be divided into two regions: the subacrosomal layer (red) and the postacrosomal sheath (yellow).