Fig. 3
From: Intestinal mucus: the unsung hero in the battle against viral gastroenteritis
Schematic overview of mucus compositional differences between the respiratory system and the small intestines. Small gas molecules and lactoferrins are predominant in the respiratory mucus while the cytokines and secreted digestive enzymes are more common in the small intestinal mucus.
Adapted from Bansil et al. [30]