MaleSpicFIG 5: The sheath and socket syncytiums.
A. Low-power TEM showing the two spicule sensory neurons which are surrounded by the sheath cell syncytium which in turn is surrounded by the socket cell syncytium, transverse view. (Image source: N2Y LP [MRC] 77.)
B. Higher magnification TEM of white boxed region in A, transverse view.
C. Closer view of the gap junction from the white boxed region in B (Image source: N2Y [MRC] 840R.) (PAG) Pre-anal ganglion; (LG[L/R]) lumbar ganglia; (DRG) dorso-rectal ganglion; (N) nucleus; (GJ) gap junction.