MusFIG 3: Muscle arms.

A. Diagram of cross section of the body indicating muscle arms of the body wall muscles. In C. elegans, body wall muscles are arranged in four quadrants with two rows of muscle cells in each quadrant (only right side is labeled). Each body muscle cell is innervated by extending several muscle arms that reach the nearest nerve cord. No muscle arms are extended to the opposite cord. (Light orange line) Basal lamina separates the muscle from the nerve cords and the hypodermis. Hypodermis, which is stylized in this diagram for illustration purposes, separates muscle from cuticle.
B. Schematic of the enteric muscles, lateral view. (Asterixes) Muscle arms from the enteric muscles synapsing onto DVB neuron.

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