What is difference between lamina ptopria and submucosa

Lamina Propria: This is the layer of loose connective tissue that lies directly beneath the epithelium (the lining tissue) of the digestive tract. It contains blood vessels, lymphatic vessels, nerves, and immune cells. It supports the epithelium and plays a role in absorption and immune defense.

Submucosa: This layer is located beneath the lamina propria. It is typically composed of denser connective tissue and contains larger blood vessels, lymphatic vessels, and nerves, including the submucosal plexus (Meissner's plexus), which controls secretions and blood flow. It serves to bind the mucosa to the underlying muscle layer and provides structural support.