Digestion and Absorption of Fats
FUNDAMENTALS OF HUMAN NUTRITION
TOPIC: THE DIGESTION AND ABSORPTION OF FATS
Final Presentation [pic][pic]
Submitted to:-
Miss Mehmoona Khalid
Submitted By:-
Sana Nadeem
Arooj Khayyam
Shaista Butt
Affaf Rahman
SEMESTER- II
CONTENTS
• Introduction of Digestion
• Digestion of Triglycerides in GI Tract
• In Mouth
• In Oesophagus
• In Stomach
• In Small Intestine
• Lipids Absorption
• Lipids in the Body
Digestion of triglycerides (Fat) through the GI Tract:
The triglycerides are digested through the GI tract by the following route:
In the Mouth:
Fat digestion starts off slowly in the mouth, with some hard fats beginning to melt when they reach body temperature.
[pic]
Role of Salivary Glands:
A salivary gland at the base of the tongue releases an enzyme called lingual lipase that plays:
• In Adults: A minor role in the digestion in adults.
• In Infants: An active role in infants. In infants, this enzyme efficiently digests the short-and medium- chain fatty acids found in milk.
In Oesophagus:
This is a simple tube through the thorax, which connects the mouth to the rest of the gut. No digestion takes place in oesophagus. There is a thin epithelium, no villi, a few glands secreting mucus, and a thick muscle layer, which propels the food by peristalsis. This is a wave of circular muscle contraction, which passes down the oesophagus and is completely involuntary. The oesophagus is a soft tube that can be closed, unlike the trachea, which is a hard tube, held open by rings of cartilage.
In the Stomach:
In a quiet stomach, fat would float as a layer above the other components of swallowed food. But the strong muscle contractions of the stomach propel the stomach contents toward the pyloric spinchter. Some chime (chewed
TOPIC: THE DIGESTION AND ABSORPTION OF FATS
Final Presentation [pic][pic]
Submitted to:-
Miss Mehmoona Khalid
Submitted By:-
Sana Nadeem
Arooj Khayyam
Shaista Butt
Affaf Rahman
SEMESTER- II
CONTENTS
• Introduction of Digestion
• Digestion of Triglycerides in GI Tract
• In Mouth
• In Oesophagus
• In Stomach
• In Small Intestine
• Lipids Absorption
• Lipids in the Body
Digestion of triglycerides (Fat) through the GI Tract:
The triglycerides are digested through the GI tract by the following route:
In the Mouth:
Fat digestion starts off slowly in the mouth, with some hard fats beginning to melt when they reach body temperature.
[pic]
Role of Salivary Glands:
A salivary gland at the base of the tongue releases an enzyme called lingual lipase that plays:
• In Adults: A minor role in the digestion in adults.
• In Infants: An active role in infants. In infants, this enzyme efficiently digests the short-and medium- chain fatty acids found in milk.
In Oesophagus:
This is a simple tube through the thorax, which connects the mouth to the rest of the gut. No digestion takes place in oesophagus. There is a thin epithelium, no villi, a few glands secreting mucus, and a thick muscle layer, which propels the food by peristalsis. This is a wave of circular muscle contraction, which passes down the oesophagus and is completely involuntary. The oesophagus is a soft tube that can be closed, unlike the trachea, which is a hard tube, held open by rings of cartilage.
In the Stomach:
In a quiet stomach, fat would float as a layer above the other components of swallowed food. But the strong muscle contractions of the stomach propel the stomach contents toward the pyloric spinchter. Some chime (chewed
References: • Digestive System, Retrieved on;12/04/2011,http//www.scienceaid.co • How Fats are Digested, Retrieved on;12/04/2011, http//www. .bio.davidson.edu • Digestion, Retrieved on;12/04/2011, http//www.wikipedia.com • How Small Intenstine Work in Digestion, Retrieved on;12/11/2011, http//www.answers.com • Digestion of Triglycerides in GI Tract, 12th ed. Eleanor Noss Whitney, Sharon Rady Rolfes - 2008