Digestive apparatus
Digestion of nutrients is essential for any living organism to get the energy, and the building blocks for the various physiologic functions of the body, and for growth, repair and reproduction.
Digestive system[edit | edit source]
The digestive system prepares nutrients for utilization by body cells through six activities, or functions: ingestion, mechanical digestion, chemical digestion, movements, absorption, and elimination.
Regions of the digestive system[edit | edit source]
Regions of the digestive system can be divided into two main parts: alimentary tract and accessory organs.
Alimentary tract[edit | edit source]
The alimentary tract of the digestive system is composed of the mouth, pharynx, esophagus, stomach, small and large intestines, rectum and anus.
Accessory digestive organs[edit | edit source]
Associated with the alimentary tract are the following accessory organs: salivary glands, liver, gallbladder, and pancreas.
Layers of the digestive system[edit | edit source]
The wall of the digestive tract has four layers or tunics: mucosa, submucosa, muscular layer, and serous layer or serosa.
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Contributors: Prab R. Tumpati, MD
