He formed the Trivrit (stoma) from his mouth.
"Myth, Ritual, and Religion, Vol. 1" by Andrew Lang
Pharmakon aelthe Bion poti son stoma, pharmakon eides.
"Adonais" by Shelley
By change in shape of these cells the opening of the stoma is made larger or smaller.
"A Civic Biology" by George William Hunter
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