Some of the factors that affect the rate at which particles diffuse include: the particle's molecular weight, temperature, concentration difference, diffusion distance, permeability and surface area.
This region of the stomach is called the 'cardiac' region. How does the mucosa in this region change? Gastric Glands in the fundus (body) of the stomach. The epithelium of the mucosa of the fundus and body of the stomach forms invaginations called gastric pits. The lamina propria contains gastric glands, which open into the bases of the gastric pits. These glands are responsible for the synthesis and secretion of the gastric juice.
Stomach - Part 2 : The inner-layers of the Stomach. The layers of the stomach shown in the diagram on the left are (from the centre of the stomach outwards): Lumen of the Stomach. Mucosa - has three layers and also contains the gastric pits (openings of passageways that extend towards the inner stomach wall) Mucosal Layer - Mucosal epithelium.