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The Digestive System

The Digestive System. The Mouth The Digestive System The Mouth Physical Digestion

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The Digestive System

The Digestive System

The Digestive System

The Mouth

The Digestive System

The Mouth

•Physical Digestion

The Digestive System

The Mouth

•Physical Digestion

•Chewing

The Digestive System

The Mouth

•Physical Digestion

•Chewing

•Chemical Digestion

The Digestive System

The Mouth

•Physical Digestion

•Chewing

•Chemical Digestion

•Saliva starts starch digestion

The Digestive System

The Digestive System

Esophagus

The Digestive System

Esophagus

•Connects mouth to stomach

The Digestive System

The Digestive System

Stomach

The Digestive System

Stomach

•Chemical digestion

The Digestive System

Stomach

•Chemical digestion

•Enzymes and hydrochloric acid

The Digestive System

Stomach

•Chemical digestion

•Enzymes and hydrochloric acid

•begin protein digestion

The Digestive System

The Digestive System

Liver

The Digestive System

Liver

•Produces bile to emulsify fat

The Digestive System

The Digestive System

Pancreas

The Digestive System

Pancreas

•Produces most digestive enzymes

The Digestive System

Pancreas

•Produces most digestive enzymes

•These enzymes digest carbohydrates, proteins, and fats

The Digestive System

The Digestive System

Duodenum

The Digestive System

Duodenum

•First part of small intestine

The Digestive System

Duodenum

•First part of small intestine

•Receives bile from liver

The Digestive System

Duodenum

•First part of small intestine

•Receives bile from liver

•Receives enzymes from pancreas

The Digestive System

Duodenum

•First part of small intestine

•Receives bile from liver

•Receives enzymes from pancreas

•Adds more enzymes

The Digestive System

The Digestive System

Small Intestine

The Digestive System

Small Intestine

•Chemical Digestion completed

The Digestive System

Small Intestine

•Chemical Digestion completed

•Proteins digested into amino acids

The Digestive System

Small Intestine

•Chemical Digestion completed

•Proteins digested into amino acids

•Carbohydrates digested into simple sugars

The Digestive System

Small Intestine

•Chemical Digestion completed

•Proteins digested into amino acids

•Carbohydrates digested into simple sugars

•Fats digested into fatty acids and glycerol

The Digestive System

Small Intestine

•Absorption of all nutrients into bloodstream

The Digestive System

Small Intestine

•Absorption of all nutrients into bloodstream

•amino acids

The Digestive System

Small Intestine

•Absorption of all nutrients into bloodstream

•amino acids

•simple sugars

The Digestive System

Small Intestine

•Absorption of all nutrients into bloodstream

•amino acids

•simple sugars

•fatty acids and glycerol

The Digestive System

Small Intestine

•Absorption of all nutrients into bloodstream

•amino acids

•simple sugars

•fatty acids and glycerol

•vitamins and minerals

The Digestive System

The Digestive System

Large Intestine

The Digestive System

Large Intestine

•reabsorbs water back into bloodstream

The Digestive System

Large Intestine

•reabsorbs water back into bloodstream

•healthful bacteria make some vitamins from waste

The Digestive System

The Digestive System

Rectum

The Digestive System

Rectum

•Temporarily stores wastes before evacuation

The Digestive System

The Digestive System

Anus

The Digestive System

Anus

•Exit for waste

The Digestive System

Anus

•Exit for waste

•Kept closed by anal sphincter muscle

Digestion Summary

Physical Chemical Absorption

Mouth Chewing Saliva digestsstarch

none

Stomach none Begin proteindigestion

none

SmallIntestine

Fatsemulsified

All digestioncompleted

All nutrientsabsorbed

LargeIntestine

none none Waterreabsorbed

Enzyme Summary

Digestcarbohydrates

Digestproteins

Digest fats

Mouth Yes - saliva no no

Stomach no Yes- gastricjuice

no

SmallIntestine

Yes - many Yes - many Yes

LargeIntestine

no no no

End of Digestion Summary