A longitudinal section of a muscle larva of Trichinella spiralis including the midgut and the genital primordium.

The midgut makes turn two times here in this particular micrograph . The lumen is collapsed and the brush border is aggregated here.

This worm seems to be a male because genital primordial cells (GP) have less glycogen aggregares in the cytoplasma. @Usually female worms have more glycogen aggregares.