1. Cross-section through a worm near its tail end.
Lumbriculus variegatus
Cross-section through a worm near its tail end.
Labels:
E = dorsal epidermis (Note the absence of a muscle layer directly above dorsal blood vessel in the tail) M = muscle layer of body wall
DBV = dorsal blood vessel
IN = intestine
L = lateral giant fiber within ventral nerve cord
VNC = ventral nerve cord
CC = coelomic cavity IN CC
VBV
VNC

2. Lumbriculus variegatus Cross-sections through worm’s ventral nerve cord Top panel shows section from anterior region. Bottom panel shows section from posterior region.
Labels: L = lateral giant nerve fiber
M = medial giant nerve fiber
N = neuropil N N