VetQuiz - Anatomy Challenge on Instagram: "Answer... Submucosa - this layer of intestine contains a dense network of blood vessels and lymphatics which supply and drain the mucosa at the luminal aspect of the GIT. It also contains the Meissner's (submucosal) nerve plexus, controlling glandular secretions, absorption, and local blood flow. It contains dense irregular connective tissue rich in collagen which helps provide structural support - hence why in enteric surgery, one of the most important