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Digestive System - Coggle Diagram
Digestive System
2 subdivisions
Digestive Tract (Alimentary Canal)
30 ft long muscular tube from mouth to anus
Mouth
Pharynx
Esophagus
Stomach
Small Intestine
Large Intestine
Gastrointestinal (GI tract)
Accessory Organs
Teeth
Tongue
Salivary Glands
Liver
Gallbladder
Pancreas
5 stages of Digestion
Ingestion
selective intake of food
Digestion
mechanical + chemical breakdown of food into form usable by body
Mechanical Digestion
physical breakdown of food into smaller particles
cutting and grinding action of teeth
churning action of stomach and small intestines
exposes more food surface to digestive enzymes
Chemical Digestion
series of hydrolysis rxns to break dietary macromolecules into monomers (residues)
Polysaccharides
Monosaccharides
Proteins
Amino Acids
Nucleic Acids
Nucleotides
Fats
Monoglycerides
Fatty Acids
carried out by digestive enzymes from
Salivary glands
stomach
Pancreas
small intestine
Absorption
uptake of nutrient molecules into epithelial cells of digestive tract and then into blood and lymph
Compaction
absorbing water and consolidating indigestible residue into feces
Defecation
elimination of feces
some nutrients can be directly absorbed in present form with digesting
Vitamins
Amino Acids
Minerals
Cholesterol
Water