The image above shows a squid dissection mount.  Numbered structures shown on the mount include the funnel, or siphon, (1); anterior vena cava (2); funnel, or siphon retractor, muscle (3); intestine (4); ink sac (5); gills (6); branchial hearts (7); posterior vena cava (8); intestinal cecum (9); mantle (10) and the anus (11).