Mosquitoes and ticks B. Cellular digestion 1. An alimentary canal is basically a gut tube a. Food enters through the mouth, is digested, and exits through the anus b. Stomach v. Small intestine vi. Large intestine vii. Where food enters a.
Some animals just swallow it whole, like birds, many reptiles, frogs, and fishes b.
Mucus moistens the food and lubricates the esophagus iii. Bicarbonate ions are also present and neutralize acids in food 3. Food moves through this to the stomach a. Food is moved through this tube by peristalsis , muscular contractions of smooth muscle which lines the entire alimentary canal c. This seals off the stomach from the esophagus, thereby holding food in the stomach d.