ClipArt ETC
"a, head, antennae, &c; b, pharynx; c, crop; d, gizzard; e, chyle-forming stomach; f, biliary vessels; g, small intestine; h, secreting organs" — Goodrich, 1859

Digestive Apparatus of an Insect

"a, head, antennae, &c; b, pharynx; c, crop; d, gizzard; e, chyle-forming stomach; f, biliary vessels;…

"A tiny block cut from the wall of the intestine showing villi and the mouths of glands at a; b, villus cut open to show the lacteal e and blood tubes m for absorbing food." —Davison, 1910

Section of Intestine wall

"A tiny block cut from the wall of the intestine showing villi and the mouths of glands at a; b, villus…

"There are three pairs of salivary glands. One pair lies under the tongue; one pair is found under the corners of the lower jaw; and the other pair is found in front of and below the ears." — Ritchie, 1918

Salivary glands

"There are three pairs of salivary glands. One pair lies under the tongue; one pair is found under the…

"Piece of small intestine cut open to show wrinkling of inner coat bearing villi." —Davison, 1910

Piece of small intestine

"Piece of small intestine cut open to show wrinkling of inner coat bearing villi." —Davison, 1910

"A tiny block out of the stomach wall. a, the mucous membrane; c and d, the muscles; h, gastric glands; m and n, blood tubes to the glands; e, mouths of glands within the stomach." —Davison, 1910

Cross-Section of Stomach Wall

"A tiny block out of the stomach wall. a, the mucous membrane; c and d, the muscles; h, gastric glands;…