Gastrointestinal System
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Small Intestinal Motility
The small intestine is divided into duodenum, jejunum, and ileum, with the duodenum and jejunum being the major site of digestion and absorption. Chyme takes 2 to 4 hours to move through the 5 m of the small intestine. Segmentation, which mixes intestinal contents and enhances contact
Colonic Motility
The colon reabsorbs salts and water. About 1500 mL of fluid enters the colon each day, but only 50 to 100 mL of fluid is excreted in feces. Anatomically, the colon is divided into the cecum, ascending colon, transverse colon, and descending colon. Segmental contraction of the
Lymphoid Tissues – Locations And Functions of The Tonsils And Mucosa Associated Lymphoid Tissues
The tonsils and mucosa associated lymphoid tissues are not structurally organs; however, they function as secondary lymphoid organs because they are sites of immune responses. Tonsils Tonsils (ton’-sils) are clusters of lymphoid tissue located just deep to the mucous membrane in the pharynx (fayr- inks), or throat,
Alimentary Canal: Characteristics and Layers Composing, it’s Wall and their Functions.
The alimentary canal is a muscular tube about 5 m (20 ft) in length that extends from the esophagus to the anus. Various portions of the alimentary canal are specialized to perform different digestive functions. The hollow space within the alimentary canal through which food passes is
The Location and Function of Pharynx and Esophagus
The pharynx (fayr’-inks) is the passageway that connects the nasal and oral cavities with the larynx and esophagus. It is part of both the respiratory and the digestive systems. Its digestive function is the transport of food from the mouth to the esophagus during swallowing. The swallowing
