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Movement of food through oesophagus

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Easwari Sivananda

This document discusses the movement of food through the esophagus. The chewed food moves from the mouth to the pharynx and then into the esophagus. The uvula and epiglottis prevent food from entering the nasal cavity and trachea, respectively. Contraction of involuntary muscles in the esophagus moves food unidirectionally down toward the stomach. The esophagus is surrounded by the upper and lower esophageal sphincters, which act to close the esophagus when food is not being swallowed. Food reaches the stomach in 8 seconds, where digestion is completed within 4-5 hours.

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WELCOME
NNEEWW BB..EEdd CCOOLLLLEEGGEE ,,NNEELLLLIIMMOOOODDUU EASWARI S.V.P NATURAL SCIENCE REG NO:-181/13376011
Movement of food through oesophagus
MOVEMENT OF FOOD THROUGH OESOPHAGUS The chewed food in the mouth Pharynx Uvula Epiglottis Prevent food from entering nasal cavity Prevent food from entering trachea
Movement of food through oesophagus
Movement of food through oesophagus
Pharynx oesophagus Contraction of involuntary muscles in oesophagus UNIDIIRECTIONAL
Movement of food through oesophagus
The Oesophagus is surrounded at the top and bottom by two muscular rings The Oesophagus is surrounded at the top and bottom by two muscular rings 1. upper esophageal sphincter 2. lower esophageal sphincter, 1. upper esophageal sphincter 2. lower esophageal sphincter, Act to close the esophagus when food not being swallowed Act to close the esophagus when food not being swallowed The Oesophageal sphincters are functional, but not anatomical sphincters, meaning that they are sections of the esophageal wall that act as a sphincter, but do not have distinct thickenings like other sphincters The Oesophageal sphincters are functional, but not anatomical sphincters, meaning that they are sections of the esophageal wall that act as a sphincter, but do not have distinct thickenings like other sphincters
Movement of food through oesophagus
Movement of food through oesophagus
Food reaches the stomach in 8 sec ssttoorreedd Digestion completes in stomach in 4-5 Digestion completes in stomach in 4-5 hours hours Continous movement Grinds & mixes food throughly Mechanical digestion
Movement of food through oesophagus
Movement of food through oesophagus
Movement of food through oesophagus

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Movement of food through oesophagus

  • 2. NNEEWW BB..EEdd CCOOLLLLEEGGEE ,,NNEELLLLIIMMOOOODDUU EASWARI S.V.P NATURAL SCIENCE REG NO:-181/13376011
  • 4. MOVEMENT OF FOOD THROUGH OESOPHAGUS The chewed food in the mouth Pharynx Uvula Epiglottis Prevent food from entering nasal cavity Prevent food from entering trachea
  • 7. Pharynx oesophagus Contraction of involuntary muscles in oesophagus UNIDIIRECTIONAL
  • 9. The Oesophagus is surrounded at the top and bottom by two muscular rings The Oesophagus is surrounded at the top and bottom by two muscular rings 1. upper esophageal sphincter 2. lower esophageal sphincter, 1. upper esophageal sphincter 2. lower esophageal sphincter, Act to close the esophagus when food not being swallowed Act to close the esophagus when food not being swallowed The Oesophageal sphincters are functional, but not anatomical sphincters, meaning that they are sections of the esophageal wall that act as a sphincter, but do not have distinct thickenings like other sphincters The Oesophageal sphincters are functional, but not anatomical sphincters, meaning that they are sections of the esophageal wall that act as a sphincter, but do not have distinct thickenings like other sphincters
  • 12. Food reaches the stomach in 8 sec ssttoorreedd Digestion completes in stomach in 4-5 Digestion completes in stomach in 4-5 hours hours Continous movement Grinds & mixes food throughly Mechanical digestion