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There are two predominant forms of stomach in fish- one is like a bent tube (siphonal), and the other a blind tube (caecal). The herring has a caeca. Labels: The esophagus. 2, Stomach. 3, Small intestine. 4, Caeca. 5, Air-bladder. 7, Pneumatic duct.

The Alimentary Canal of the Herring

There are two predominant forms of stomach in fish- one is like a bent tube (siphonal), and the other…

cc. Colic caeca, d. Duodenum. g. Glandular patch, l.l. Meckel's tract, l.i. Hind-gut, p.v. Cut root of portal vein, r.v. Rectal vein, s. Proventriculus, y. Meckel's diverticulum.

Intestinal Tract of Chauna Chavaria

cc. Colic caeca, d. Duodenum. g. Glandular patch, l.l. Meckel's tract, l.i. Hind-gut, p.v. Cut root…

"Daphnia. E., Eye; A.2, second antenna; A.1, first antenna; dg., digestive caeca; s.g., shell gland; go., gonad; h., heart in pericardium; o., ovum; B.p., brood-pouch; sp., spine; f., furca; s., setae; Ab., rudimentary abdomen; t., caudal fork; g., gut; 1-5, thoracic limbs." -Thomson, 1916

Daphnia

"Daphnia. E., Eye; A.2, second antenna; A.1, first antenna; dg., digestive caeca; s.g., shell gland;…

"Asterias rubens. Digestive system. an, anus; card. st, cardiac division of the stomach; int. caec, intestinal caeca; madr, madreporite; ply. caec, pyloric caeca; pyl. st, pyloric division of the stomach." -Parker, 1900

Common Starfish

"Asterias rubens. Digestive system. an, anus; card. st, cardiac division of the stomach; int. caec,…