Digestive apparatus

From WikiMD's WELLNESSPEDIA

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
Digestive system

Digestive system[edit]

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]

Regions of the digestive system can be divided into two main parts: alimentary tract and accessory organs.

Alimentary tract[edit]

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]

Associated with the alimentary tract are the following accessory organs: salivary glands, liver, gallbladder, and pancreas.

Layers of the digestive system[edit]

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
Lip
Cheek
Palate
Gums
Glands


Anatomy of the gastrointestinal tract, excluding the mouth
Upper
Lower
Wall


Anatomy of the liver, pancreas and biliary tree
Liver
Biliary tract
Pancreas


Physiology of the gastrointestinal system
GI tract
Upper
Lower
Enteric nervous system
Either/both
Accessory
Abdominopelvic



Development of the digestive system
Foregut
Midgut
Hindgut
Other
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Human systems and organs
Musculoskeletal system
Circulatory system
Cardiovascular system
* peripheral -- Artery -- Vein -- Lymphatic vessel - Heart
Lymphatic system
* primary -- Bone marrow -- Thymus - secondary -- Spleen -- Lymph node - CNS equivalent -- Glymphatic system
Nervous system
Integumentary system

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