Stomach
(250x). The actual size of the muscularis (a) is ~ 4x
that of the submucosa (c) in this species, and is even
more pronounced in larger specimens. b) gastric gland.
d) lumen.
Stomach
(250x). a) submucosa. b) gastric gland. c) lumen.
Stomach.
Bisected
stomach.
The relatively small lumen is usually found full of sand.
The stomach is muscular and gizzard-like, and probably uses
the sand to help grind the algal forage to break the cell
walls.
