1. Digestive System
5th Hour Group PAIGE

2. Include the following on your slide:
Name of organ
Description of structure
Function of organ
Identify if there is mechanical &/or chemical digestion occurring
Picture of the organ
Identify any secretions produced
Function of secretions
Use only 1 slide. Make sure it is neat & easy to read.

3. Mouth
external opening, a hollow cavity, located along the body’s midline inferior to the nose and superior to the chin
Chewing breaks the food into pieces that are more easily digested
saliva mixes with food to begin the process of breaking it down into a form your body can absorb and use.
Mechanical digestion occurs(chewing)
Chemical Digestion(Saliva-Amylase)
Saliva is the secretion produced
moistening food and helping to create a food bolus- Saliva contains the enzyme amylase,which is capable of breaking down starch into simpler sugars

4. Pharynx
Function- serves as a pathway for food from the mouth to the esophagus
Structure- Contains three regions- nasopharynx, oropharynx, laryngopharynx
No mechanical or chemical digestion
No secretions except for mucus

5. Esophagus Connects the throat to the stomach
Carries food, liquids, and saliva from the mouth to the stomach
Mechanical digestion occurs
Mucus is secreted

6. Stomach -Crescent shaped organ lined with mucous cells
-Stores food while it is being mixed with enzymes to break down food
-Chemical and mechanical breakdown occurs
-Produces gastric juice which is a mixture of mucus, hydrochloric acid, and digestive enzymes including pepsinogen which breaks down proteins
-The gastric juices secrete enzymes for the breakdown of proteins, Hydrochloric acid activates pepsinogen, which helps digestion by breaking the bonds linking amino acids, process called proteolysis

7. Small Intestine
Partially digested food, or chyme, from the stomach is mixed with bile from the liver and pancreatic juice from the pancreas to complete its digestion in the duodenum.
serves as the primary site of nutrient absorption
small intestine secrete digestive enzymes that chemically break down complex food molecules into simpler ones.
Secretes motilin, secretion, CCK -- function was completing the digestion of peptides, carbohydrates & fats

8. Large Intestine Part of the final stages of digestion
Wraps around the border of the abdominal body cavity
The function of the large intestine is to get rid of food left over after the nutrients are removed from it, bacteria, and other waste
Converts food into feces, absorbing essential vitamins produced by gut bacteria
Chemical digestion
Secretion: large amounts of water

9. Salivary Gland
There are three salivary glands: There are two parotid glands near the ear which are the largest salivary glands, the sublingual gland is under the tongue, the submandibular gland is in the shape of a “U”. It is under the chin bone which is called the mandible.
The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. It also helps break down carbohydrates and lubricates the passage of food down from the oro-pharynx to the esophagus to the stomach.
Chemical digestion
Secretes saliva, which is formed of several things including amylase, a digestive enzyme that breaks down starch into maltose and glucose.
Saliva moistens food and helps to create a food bolus.

10. Liver A large organ that sits above the stomach
The liver processes nutrients absorbed by the small intestine
Detoxifies chemicals and makes proteins
Aids in chemical digestion
Secretes digestive enzymes
Digestive enzymes that continue the breakdown of food in the digestive system

11. Gallbladder Small in size, inferior and posterior to the liver
Hold bile produced in the liver until it is needed for digesting fatty foods
Chemical digestion
Secretes bile into the duodenum
to aid in the digestion of chyme

12. Pancreas Long and flat gland
Enzymes break down food, releases juices directly into bloodstream
Chemical digestion
Insulin & glucagon
Maintain proper level of
blood sugar.