Histology of Alimentary Canal Biology

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HISTOLOGY OF HUMAN ALIMENTARY CANAL • The wall of the alimentary canal (from the esophagus to rectum) consists of four basic layers: • Serosa: It is the outer mode layer. The serosa is made up of thin mesothelium (epithelium of visceral organs) with areolar connective tissue. • Muscularis: It is composed of smooth muscles usually arranged into an outer longitudinal and inner circular muscle fiber. • Submucosa: It is composed of loose connective tissue richly supplied with blood and lymphatic vessels and in some areas with glands. • Mucosa: It is the innermost layer that secretes mucus. It is composed of three layers: • Muscularis mucosa- It is a thin layer of smooth muscles. • Lamina propria- It is a layer of connective tissue. It is unusually cellular so it is compared to most connective tissues. • Epithelium- the innermost layer and is responsible for most digestive, absorptive, and secretory processes. • For more videos, online classes, 24X7 Doubts solving and Mock tests, Visit Toppr - The better learning app. • #BetterLearning on the Toppr app, download now • Google Play: http://bit.ly/2vRBqcb • App Store: http://apple.co/2vpRAr9 • Website: https://www.toppr.com/ • Download Doubts on Chat App: • Android Play Store: http://bit.ly/2B6w7oy • iOS App Store: http://apple.co/2ziAA75 • Facebook: / beingtoppr • Twitter: / mytoppr • Instagram: / mytoppr • LinkedIn: / toppr-com

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