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Four Stages of Digestive System
Ingestion
Digestional (large molecules to small)
Absorbtion
Elimination
2 Types of Digestion
Mechanical (movement)
Chemical (enzymes)
Tube of You Order
Mouth
Pharynx
Esophagus
Stomach
Small Intestine
Large Intestine
Accessory Organs
Teeth
Tongue
Gallbladder
Salivary Glands
Liver
Pancreas
3 Salivary Glands
Parotid Gland - under ear
Submandibular Gland - under mandible
Sublingual Gland - under tongue
Saliva Enzymes
Salivary Amylase - carbs
Lysozyme - bacteria
Swallowing (Deglutition) Stages
Voluntary Stages - actually swallowing, leads to pharynx
Pharyngeal Stage - pharynx to esophagus
Esophageal Stage - esophagus to stomach
Perisalsis
The act of pushing food to the stomach from esophagus
Esophageal Hiatus
Opening of diaphragm for esophagus
Pyloric Sphicter
Valve separating stomach and duodenum
Cardiac Orifice
Valve separating esophagus and stomach
Maceration (Stomach)
Mixing waves that churn food on the inside and mixes it with gastric juices which converts into chyme(thin liquid)
Pancreatic juice is…
alkaline mixture and digestive enzymes from acini cells + bicarbonate neutralizes HCl to ph of 8
Pancreatic Digestive Enzymes
Amylase
Lipase
Trypsin
Nuclease
Liver Purpose
Metabolism of carbs, fats, and proteins after absorbtion + secretes bile
How much bile is made per day
1 quart
Gallbladder purpose
Stores bile until needed by small intestine
3 Parts of Small Intestine
Duodenum
Jejunum
Ileum
6 Parts of Large Intestine
Appendix
Cecum
Ascending
Transverse
Descending
Sigmoid
Duodenum
Beginning of small intestine + attached to the stomach (12-14 inch)
Jejunum
After duodenum (8ft)
Ileum
After jejunum(12ft) + has ileocecal valve
Villi
Tiny finger like bumps that help absorb nutrients in the small intestine
Lymph
Clear fluid that travels through the body’s lymphatic system and carries immune cells and removes waste
Absorption occurs through villi by…
Diffusion
Osmosis
Facilitated Diffusion
Active Transport
Diffusion
Concentration of low to high
Osmosis
Movement through water
Facilitated Diffusion
Concentration of low to high with help from proteins
Active Transport
Needs ATP energy