1. 7TH HEALTH

2. 3 Main Functions
a. Digestion – breakdown of foods within stomach and intestines for use by body’s cells
b. Absorption – passage of digested food from digestive tract into blood
c. Elimination – body’s expulsion of undigested food or body wastes.

3. The Digestive Process 4 sections 1. Mouth 2. Throat 3. Stomach
4. Intestines

4. The Digestive Process - Mouth
Teeth break food you eat into smaller pieces
b. Mastication – the process of chewing
c. Saliva is produced by salivary glands. Saliva contains an enzyme that breaks down food in the mouth – Amylase.

5. The Digestive Process - Mouth
d. Tongue – shapes and prepares food for swallowing
Make sure to brush tongue to avoid bad breath!!!

7. The Digestive Process – The Throat
a. The uvula – small flap of tissue at the back of the throat that prevents food from going to the nasal passages
b. The epiglottis – flap of tissue which covers the throat, preventing food from entering your airways.

8. The Digestive Process – The Throat
When food is swallowed, it enters the esophagus – a 10 inch tube that connects the throat to the stomach
d. Peristalsis – series of involuntary muscle contractions that move food through the digestive system
e. (similar to squeezing a tube of toothpaste from the bottom up)

10. The Digestive Process - Stomach
a. Stomach - hollow sac-like organ connected to the esophagus
b. Functions:
- digests food with gastric juices
- moves food into small intestine
c. Converts food into chyme - a creamy mixture of food and gastric juices.

12. The Digestive Process - Intestines
a. from the stomach, food moves into small intestines
20-23 feet long, 1 inch in diameter
This is where most of the nutrients from food are absorbed into the body!!!
b. inner lining contains villi – tiny fingerlike projections that help absorb nutrients

13. The Digestive Process - Intestines
c. any unabsorbed material goes from the small intestine into the large intestine
d. here water is absorbed; helps to eliminate waste
e. undigested food passes through the large intestine; or the colon
f. exited through the anus

14. Helpers of the Digestive System
1. It is important to note food DOES NOT pass through these organs!
2. Pancreas
a. produces enzymes to help break down food
b. produces insulin to help regulate blood sugar levels

15. Helpers of the Digestive System
. Liver
a. produces bile
b. Bile – a green fluid that helps breakdown fats
4. Gallbladder
a. small pouch which stores the bile

16. Complete the table with information from the following slides.
Functional Problem
What is it? Causes?
Symptoms
Heartburn
Nausea
Gastritis
Lactose Intolerance
Peptic Ulcer

17. HEARTBURN
Caused acid refluxing back into the esophagus.

18. GASTRITIS
An inflammation, irritation, or erosion of the lining of the stomach.
Causes: Irritation from excessive alcohol use, chronic vomiting, stress
Symptoms: Nausea or upset stomach, abdominal pain, vomiting, indigestion, burning feeling in stomach between meals.

19. LACTOSE INTOLERANCE

20. the body cannot easily digest lactose, a type of natural sugar found in milk and dairy products.
Lactose intolerance occurs when the small intestine does not make enough of an enzyme called lactase. Your body needs lactase to break down, or digest, lactose.
Symptoms:
Bloating.
Pain or cramps.
Gurgling or rumbling sounds in your belly.
Gas.

21. PEPTIC ULCER

22. painful sores or ulcers in the lining of the stomach or first part of the small intestine
No single cause has been found for ulcers. However, it is now clear that an ulcer is the end result of an imbalance between digestive fluids in the stomach and duodenum.
Symptoms:
A gnawing or burning pain in the middle or upper stomach between meals or at night
Bloating
Heartburn
Nausea or vomiting

23. NAUSEA
Nausea is an unpleasant sensation of discomfort or unease in the stomach (queasy stomach), accompanied by an urge to vomit.
Several possible causes include: Symptoms include:
motion sickness intense headache
stomach infection fever
Migraine vomiting
Certain odors dizziness
Food poisoning light-headedness
Viruses
Emotional stress

24. Digestive System Care 1. Eat foods high in fiber!
Fiber helps food and waste pass through the digestive tract
Reduces risk of colon cancer
Beans, Prunes, Pears, and Leafy Green Vegetables are good sources

25. Digestive System Care 2. Drink plenty of water 8 glasses a day!
Helps keep things moving regularly

26. Digestive System Care 3. Eat slowly and don’t hurry through your meals
Eating too fast can cause gas or indigestion

27. In Class Assignment
In class, you will be working with a partner to write a creative story of a trip through the digestive system.
You will pretend you are a piece of food going step by step through the digestion process.