ClipArt ETC
"Vertical section of a sea anemone. t., Tentacles; o., mouth; oes., oesophagus; c., c'., apertures through a mesentery; a., a'., acontia; g., genital organs on mesentery; m.f., mesenteric filaments; m.l. longitudinal muscles; s., primary septum or mesentery; s'., secondary septum; s''., tertiary septum; v., basal disc." -Thomson, 1916

Sea Anemone

"Vertical section of a sea anemone. t., Tentacles; o., mouth; oes., oesophagus; c., c'., apertures through…

"Section through sea anemone. A, B, Directive septa; m.f., mesenteric filaments; g., genital organs; m.l., longitudinal muscles; s., primary septum; s'., secondary septum; s''., tertiary septum. The arrow enters between two primary septa (an intra-septal cavity), and passes out between two tertiary septa." -Thomson, 1916

Sea Anemone

"Section through sea anemone. A, B, Directive septa; m.f., mesenteric filaments; g., genital organs;…