The intestine is composed of four main layers: the mucosa, submucosa, muscularis externa, and serosa. Each of these layers has distinct structures and functions:
Mucosa: The innermost layer, which includes the epithelium, lamina propria, and muscularis mucosae. The epithelium is responsible for nutrient absorption and secretion of digestive enzymes. Submucosa: A layer of connective tissue containing blood vessels, nerves, and glands. It supports the mucosa and provides nutrients. Muscularis Externa: Composed of smooth muscle layers, it facilitates the movement of intestinal contents through peristalsis. Serosa: The outermost layer, consisting of connective tissue and a layer of epithelial cells, providing structural support and protection.
