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
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
Regions of the digestive system can be divided into two main parts: alimentary tract and accessory organs.
Alimentary tract
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
Associated with the alimentary tract are the following accessory organs: salivary glands, liver, gallbladder, and pancreas.
Layers of the digestive system
The wall of the digestive tract has four layers or tunics: mucosa, submucosa, muscular layer, and serous layer or serosa.
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| Anatomy of the mouth | ||||||||||
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| Anatomy of the gastrointestinal tract, excluding the mouth | ||||||
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| Anatomy of the liver, pancreas and biliary tree | ||||||
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| Physiology of the gastrointestinal system | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Development of the digestive system | ||||||||
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| Tests and procedures involving the human digestive system | ||||||||||||||
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| Human systems and organs | ||||||||||||||
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Contributors: Prab R. Tumpati, MD
