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Fig. 11. Schematic drawing of anterior cardiac nerves (ACN) and valve nerves in the anterior part of the heart of Bathynomus. An ACN contains five axons; glutamatergic valve excitatory (VE; green), cholinergic valve inhibitory (VI) and cardioacceleratory (CA1 and CA2) (red), and GABAergic cardioinhibitory (CI; blue). The first lateral cardiac nerve (LCN1) contains two cholinergic axons, and LCN2 contains one cholinergic axon. The cell bodies and axons (green) in the heart are the cell bodies and axons of glutamatergic cardiac ganglionic neurons (CG). AMA, anterior median artery; lALA, left anterior lateral artery; rALA, right anterior lateral artery; LA, lateral artery; ACh, acetylcholine; GABA, {gamma}-aminobutyric acid; Glu, glutamate.