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The Digestive System. by: Ms. De Bell. The Digestive System. The Digestive System breaks food into nutrient molecules. These molecules are a bsorbed into the blood stream. The Digestive System eliminates the indigestible waste. You ARE what you Eat !. T able of Cont ent s.

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slide1

The Digestive System

by: Ms. DeBell

slide2

The Digestive System

The Digestive System breaks food into nutrient molecules. These molecules are absorbed into the blood stream. The Digestive System eliminates the indigestible waste.

You ARE what you Eat!

slide3

Table of Contents

Please click on each of the pictures to explore your digestive system.

Digestive Processes

The Digestive Process with Dr. Stocker

Importance

Click here to return to the start

The Players

slide4

The Players

The various players of the Digestive

System can be divided in two :

1. The Alimentary Canal

2. Accessory Digestive Organs and Digestive Glands

slide5

Digestive Tract

1. Alimentary Canal

2. Accessory Digestive Organs and

Alimentary Canal

AKA: The Gastrointestinal (GI) Tract

The alimentary canal is the muscular digestive

tube that winds through the body

Food Material in the alimentary canal is technically considered to be outside

the body because the canal is open to the external environment at both ends.

Includes:

Mouth

Pharynx

Esophagus

Stomach

Small Intestine

Large Intestine

Anus

Justremember: My purple elephant sleeps

inside icy airplanes.My purple elephant sleeps inside icy airplanes. My purple elephant sleeps inside icy airplanes.My purple elephant sleeps inside icy airplanes. My purple elephant sleeps inside icy airplanes. My purple elephant sleeps inside icy airplanes. My purple elephant sleeps inside icy airplanes.

slide6

Digestive Tract

1. Alimentary Canal

a. Mouth

2. Accessory Digestive Organs and

Digestive Glands

My…..

Mouth

  • Food enters the alimentary canal via mouth
  • Food is chewed, manipulated by the tongue, and moistened with saliva
slide7

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

2. Accessory Digestive Organs and

Digestive Glands

My purple…..

Pharynx

  • Passage way of food, fluids, and inhaled air.
  • The Pharynx is made of three muscles. The muscles are like three stacked clutching fists. The muscles contract in sequence from superior to inferior to squeeze food in to the esophagus.
slide8

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

2. Accessory Digestive Organs and

Digestive Glands

My purple elephant…..

Esophagus

  • A muscular tube that propels swallowed food to the stomach
  • Sphincter
  • (def.) A muscle surrounding an opening; acts
  • as a valve to close and open the orifice. Think of a
  • draw string back. The string around the opening
  • acts to open and close the bag depending on
  • whether its contracted or lose.
slide9

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

2. Accessory Digestive Organs and

Digestive Glands

My purple elephant sleeps…..

Stomach

  • A temporary storage tank in which food is churned and turned into a paste called chyme “juices”.
  • The stomach is the first site where food begins to break down
  • Some, although little, nutrients is absorbed in the stomach
  • Food hangs out in the stomach for about 4 hours; just about as long as you study for my class every night!
slide10

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

2. Accessory Digestive Organs and

Digestive Glands

My purple elephant sleeps inside…..

Small Intestine

  • Longest part of the alimentary canal
  • This is the site where most of the enzymatic digestion and virtually all absorption of your pizza occurs
  • It’s important to note that although most digestive enzymes break down food here, enzymes are actually secreted by the pancreases
slide11

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

f. Large Intestine

2. Accessory Digestive Organs and

Digestive Glands

My purple elephant sleeps inside icy…..

Large Intestine

  • Gunk remains here for 12-24 hours!
  • The large intestines absorb water and electrolytes
  • from digested mass, resulting in semi- solid feces.
slide12

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

f. Large Intestine

G. Anus

2. Accessory Digestive Organs and

Digestive Glands

My purple elephant sleeps inside icy airplanes.

Anus

The opening at the end of the alimentary canal where feces exits

slide13

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

f. Large Intestine

G. Anus

2. Accessory Digestive Organs and

Digestive Glands

a. Organs

b. Glands

Accessory Digestive Organs

and Digestive Glands

Organ (def.) a part of the body formed of two or more tissues and adapted to carry out a specific function

Gland (def.) a structure whose cells are specialized for secretion

Digestive Organs

Teeth

Tongue

Gallbladder

Digestive Glands

Salivary Gland

Liver

Pancreas

Just remember… Ten tall giraffes smell like pancakes!

Ten tall giraffes smell like pancakes! Ten tall giraffes smell like pancakes! Ten tall giraffes smell like pancakes! Ten tall giraffes smell like pancakes!

Ten tall giraffes smell like pancakes! Ten tall giraffes smell like pancakes!

slide14

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

f. Large Intestine

G. Anus

2. Accessory Digestive Organs and

Digestive Glands

a. Organs

i. Teeth

Ten…

Teeth

{Organ}

Blades that tear and grind food in to smaller fragments

slide15

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

f. Large Intestine

G. Anus

2. Accessory Digestive Organs and

Digestive Glands

a. Organs

i. Teeth

ii. Tongue

Ten tall…

Tongue

{Organ}

Occupies the floor of your mouth is a muscle constructed of skeletal muscle fiber

Your tongue is important because it grips and constantly repositions food in between teeth. It also helps mix food with saliva to get a compact mass, bolus.

slide16

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

f. Large Intestine

G. Anus

2. Accessory Digestive Organs and

Digestive Glands

a. Organs

i. Teeth

ii. Tongue

iii. Gall Bladder

Ten tall giraffes…

Gallbladder

{Organ}

The gall bladder stores and concentrates bile

Bile is a greenish fluid secreted

by the liver, stored in the gallbladder, and released in to the small intestine; helps start the break down of fats

slide17

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

f. Large Intestine

G. Anus

2. Accessory Digestive Organs and

Digestive Glands

a. Organs

i. Teeth

ii. Tongue

iii. Gall Bladder

b. Glands

i. Salivary Glands

Ten tall giraffes smell…

Salivary Gland

{gland}

Salivary glands produce saliva

Saliva moistens the mouth, dissolves food chemicals so they can be tasted, wets food, binds the food together into a bolus.

Saliva~ a complex

mixture of water, ions,

mucus, and enzymes

slide18

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

f. Large Intestine

G. Anus

2. Accessory Digestive Organs and

Digestive Glands

a. Organs

i. Teeth

ii. Tongue

iii. Gall Bladder

b. Glands

i. Salivary Glands

ii. Liver

Ten tall giraffes smell like…

Liver

{gland}

  • The liver is the LARGEST gland in the body, it weighs about 3Ibs in average adult (pick up your science book)
  • The liver has many functions…..
  • The liver produces bile
  • The liver picks up glucosefrom the
  • blood supply of the alimentary canal
  • and stores it as glycogen

Remember….Bile is a greenish

fluid secreted by the liver,

stored in the gallbladder, and

released in to the small intestine;

helps start the break down

of fats

slide19

Digestive Tract

1. Alimentary Canal

a. Mouth

b. Pharynx

c. Esophagus

d. Stomach

e. Small Intestine

f. Large Intestine

G. Anus

2. Accessory Digestive Organs and

Digestive Glands

a. Organs

i. Teeth

ii. Tongue

iii. Gall Bladder

b. Glands

i. Salivary Glands

ii. Liver

iii. Pancreas

Ten tall giraffes smell like pancakes.

Pancreas

{gland}

  • Secretes enzymes in to the small intestine for enzymatic digestion
  • Produces hormones (insulin and glucagon) which regulate the levels of sugar in the blood
slide20

Digestive Processes

The digestive system performs

the following essential

food- processing activities…..

slide21

Digestive Processes:

Ingestion

Ingestion

Is the taking of food in to the mouth

slide22

Digestive Processes:

Ingestion

Propulsion

Propulsion

The movement of food through the alimentary canal.

Alimentary Canal = (My purple elephant sleeps inside icy airplanes)

slide23

Mechanical Digestion

Digestive Processes:

Ingestion

Propulsion

Mechanical Digestion

Physically prepares food for chemical digestion

Includes:

Chewing

Churning in the stomach

Segmentation ( the rhythmic local constrictions of the intestines)

slide24

Chemical Digestion

Digestive Processes:

Ingestion

Propulsion

Mechanical Digestion

Chemical digestion

A series of steps on which complex food molecules are

broken down in to their chemical building blocks

Process is carried out by enzymes

Food Molecules get broken down

in to chemical building blocks your body

utilizes to carry out metabolic process….

Food Molecule Chemical Building Block

Carbohydrates Sugar

Proteins Amino Acids

Lipids Fatty Acids and Glycerol

(respectfully)

slide25

Digestive Processes:

Ingestion

Propulsion

Mechanical Digestion

Chemical digestion

Absorption

Absorption

Is the transport of digested end products from the alimentary canal in to the blood and lymph capillaries

slide26

Digestive Processes:

Ingestion

Propulsion

Mechanical Digestion

Chemical digestion

Absorption

Defecation

Defecation

The elimination of indigestible substances from the body as feces

slide27

The Digestive Process with Dr. Stocker

Insert Dr. Stocker’s photo here or the principals photo for example

slide28

The Digestive Process with Dr. Stocker

Food is any substance, usually composed primarily of carbohydrates, fats, water and/or proteins, that can be eaten or drunk by an animal or human for nutrition or pleasure.

Nutrition (also called nourishment or aliment) is the provision, to cells and organisms of the materials necessary (in the form of food) to support life.

Foods have different nutritional values…….

slide33

The Digestive Systems is Important because …..

  • The Digestive System breaks down food molecules into chemicals our body needs to carry out metabolic process.
  • The Digestive System wastes indigestible food molecules the body can not use.
slide34

The Digestive Systems is Important because everyone poops!

“An elephant makes a big poopA mouse makes a tiny poopSome stop to poopOthers do it on the move”

~Taro Gomi