The digestive system also known as gastrointestinal tract or alimentary canal is responsible in turning food into nutrients. The food obtained becomes the necessary substances in promoting growth, maintenance of the body, and provides energy. The digestive system consists of the digestive canal that is made up of the oral cavity, esophagus, the stomach, the intestines (small and large), and the anus.
During the process of digestion, substances like carbohydrates, proteins, nucleic acid, and fats are broken down into smaller molecules in order to be absorbed by the small intestine. Water and electrolytes are absorbed by the large intestine.
Serosa- The outermost layer of the digestive tract. It is a serous membrane composed of a simple squamous epithelium and areolar connective tissue. It separates the abdominal cavity and the organs and provides lubrication.
Muscularis- Responsible for the breaking down of food through peristalsis or the involuntary muscle contractions. It propels food along the tract and composed of an inner circular fiber and longitudinal outer layer.
Submucosa- Presence of lymphatic vessels and blood that are responsible for the absorption of molecules of food. It is composed of an areolar connective tissue.
Mucosa- The innermost layer of the digestive tract. It lines the GI tract and responsible for the secretion and absorption. Composed of thin epithelial cells and connective tissue cells.
The digestive system also known as gastrointestinal tract or alimentary canal is responsible in turning food into nutrients. The food obtained becomes the necessary substances in promoting growth, maintenance of the body, and provides energy. The digestive system consists of the digestive canal that is made up of the oral cavity, esophagus, the stomach, the intestines (small and large), and the anus.
During the process of digestion, substances like carbohydrates, proteins, nucleic acid, and fats are broken down into smaller molecules in order to be absorbed by the small intestine. Water and electrolytes are absorbed by the large intestine.
Serosa- The outermost layer of the digestive tract. It is a serous membrane composed of a simple squamous epithelium and areolar connective tissue. It separates the abdominal cavity and the organs and provides lubrication.
Muscularis- Responsible for the breaking down of food through peristalsis or the involuntary muscle contractions. It propels food along the tract and composed of an inner circular fiber and longitudinal outer layer.
Submucosa- Presence of lymphatic vessels and blood that are responsible for the absorption of molecules of food. It is composed of an areolar connective tissue.
Mucosa- The innermost layer of the digestive tract. It lines the GI tract and responsible for the secretion and absorption. Composed of thin epithelial cells and connective tissue cells.
The rugae also known as gastric folds allow the stomach to expand or dilate when the stomach is filled with fluids or food.