Figure 3: Octopus Venous System: arv: arm veins, cve: cephalic vein, ors: orbital sinus; mnv: mantle veindgv: digestive gland, plv: pallial vein, abd: abdominal vein, pvc: posterior vena cava, dgv: digestive gland,bht: branchial heart, rec: rectum, avc: anterior vena cava, fuv: funnel vein, bma: buccal mass, oes: oesophagus, crp: crop, sii: sinus around gut, cae: caecum, abd: abdominal vein, lvc: lateral vena cava, avc: anterior vena cava, gdv: gonadal vein, int: intestine, st: stomach, psg: posterior salivary glands, da dorsal aorta. (Wells, 1983).
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