digestion powerpoint
DESCRIPTION
Melinda Costa and Tara WerryTRANSCRIPT
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Digestive Organs
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Organs that make up the digestive system
• Oral Cavity
• Pharynx
• Esophagus
• Stomach
• Small Intestine
• Large Intestine
• Anus
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Functions of the Digestive SystemFunctions of the Digestive System
IngestionIngestion Digestion (Mechanical digestion, Digestion (Mechanical digestion,
Chemical digestion)Chemical digestion) PeristalsisPeristalsis SecretionSecretion AbsorptionAbsorption EliminationElimination
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A great youtube video on A great youtube video on Digestion Digestion
• http://www.youtube.com/watch?http://www.youtube.com/watch?v=Z7xKYNz9AS0v=Z7xKYNz9AS0
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Oral Cavity
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Oral Cavity
• The oral cavity is the entrance to the GI tract.
• The epithelial lining of the oral cavity is a nonkeratinized stratified squamous epithelium.
• The oral cavity has two distinct regions: The Vestibule and The Oral Cavity Proper
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Pharynx
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Pharynx
• The pharynx is the common space used by both the respiratory and digestive systems.
• The pharynx is divided into three regions: Nasopharynx, Oropharynx, Laryngopharynx
• Three skeletal muscle pairs, called the superior, middle, and inferior pharyngeal constrictors, form the wall of the pharynx.
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Esophagus
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Esophagus
• The esophagus is a tubular passageway for swallowing materials being conducted from the pharynx to the stomach.
• The inferior region of the esophagus connects to the stomach by passing through an opening in the diaphragm called the esophageal hiatus.
• In the adult human, the esophagus is about 25 centimeters long, and most of its length is within the thorax, directly anterior to the vertebral bodies.
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Stomach, or hot air balloon?NOT a good life style choice
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Stomach
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Stomach
• The stomach is a muscular, J-shaped sac the occupies the left upper quadrant of the abdomen, immediately inferior to the diaphragm.
• The stomach is composed of four regions: Cardia, Fundus, Body and Pyloris.
• The stomach also includes: Greater Curvature, Lesser Curvature and Gastric Folds.
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Large Intestine
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Large Intestine
Also known as the “large bowel”
It is split into 5 sections: Ascending ColonTransverse ColonDescending ColonRectumAnal Canal
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Small Intestine
• The small intestine is also called the small bowel.
• The small intestine is composed of three regions: Duodenum, Jejunum, and Ileum.
• The duodenum is the first segment of the small intestine.
• The jejunum is the middle region.
• The ileum is the last region.
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Anus
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Anus
At the base of the anal canal are the internal and external anal sphincters, which close off the opening to the anal canal and open during defecation..
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THE END