The Digestive SystemHow our bodies break down

and use food

Components

Digestion can be broken into 3 stages

1. Break down of solid food

2. Nutrient absorption

3. Water absorptionBut where do these stages occur?

Stage 1: The Blender

The Players: Mouth – Mechanical

breakdown Salivary Glands –

chemical breakdown Esophagus - transport Stomach – complete

breakdown

- Mouth: The Pulverizer, big pieces into little pieces

- Salivary Glands: secrete enzymes in saliva

- Esophagus: lined with smooth muscle and mucus.

- Stomach: secretes HCl and digestive enzymes. Contracts and churns to aid in digestion

Esophageal sphincter

Stage 1: The BlenderThe Players: Mouth – The Juggernaut Salivary Glands – The Assassin Esophagus – Getaway Driver/Vehicle Stomach – Demolitions Expert

Stage 2: The Filter

The Player: Small Intestine

Duodenum : Adds bile from bile duct, more digestion (10 inches)

Jejunum: Nutrient absorption (3 feet)

Ilium: Nutrient absorption (6 feet)Why the difference in length?

Stage 2: The Filter

Stage 2: The FilterThe Player: The Mosh Pit Duodenum : “DJ Bile” plays your jam!

OMG! Jejunum: Wall of mosh pit churns and

jostles the “moshers.” The Drop = high Intensity

Ilium: Outro of song = low intensity

Stage 3: The Sponge

The Player: Large Intestine

Colon– Water absorption. Bacterial digestion = vitamins and methane.

Rectum– Storage Anus- . . . EXIT

Stage 3: The Sponge

Colon – “The Hugger,” Dab, Dab, Don’t Rub.

Rectum & Anus – Keeps “old things”. Highly sensitive. So sensitive and hip, you probably wouldn’t understand.

The Player: Large Intestine - The Transcendental Hipster Lovely Aroma

Stage 3: The Sponge

“Get the heck outta here!!” “Come here and give me a hug”