1. What are the circulatory diseases?
High Blood Pressure
Coronary Artery Disease
Heart Attack
Stroke

2. THE DIGESTIVE SYSTEM
the organ system that takes in food, digests it, and excretes the remaining waste.
made up of the digestive tract and accessory organs.

3. The Human Digestive System
Accessory organs: Liver, pancreas, gall bladder
Function:
supply digestive enzymes that break up the food to make the transportation of food easier. 3

4. The Human Digestive Track
Mouth
Esophagus
Stomach
Small intestine
Large intestine
Anus 4

5. Animal Teeth are different depending on diet – See Skulls
THE DIGESTIVE SYSTEM
Mouth
Mouth – Food is mechanically broken down by the tongue and teeth. Saliva provides water and enzymes to chemically break down the food.
Animal Teeth are different depending on diet – See Skulls
Esophagus
Stomach
Small intestine
Large intestine
Anus 5

6. Esophagus – Food passes through the tube to enter the stomach.

7. Stomach - Muscle contracts to churn the food and digestive enzymes and strong acids digest the food

8. Question: If there is acid in your stomach, how come it doesn’t eat through you stomach?

9. Small intestine
(long and skinny).
Most digestion occurs here.
Nutrients diffuse through the wall of the intestine and enter the bloodstream.

10. large intestine (short and fat)
The lining absorbs water from the undigested food.
Undigested food is packed into a solid

11. Anus
Waste exit the body through the opening at the end of the digestive system.

12. VIDEO Cow Digestive System
The Digestive System
VIDEO Cow Digestive System

14. Diseases of the Digestive System
Food Sensitivities – irritation of digestive tract by un digestible food (ex. Lactose). Symptoms are nausea, headaches, diarrhea, etc.

15. Diseases of the Digestive System
Food Allergies – The body’s immune system reacts when a certain food is eaten. Causes hives, rash, swelling and anaphylactic shock (ex. Peanuts).

16. Diseases of the Digestive System
Food Poisoning – Eating food or water that is contaminated with bacteria or chemicals they make. Often caused by poor handling and storage (salmonella, botulism). Causes vomiting, stomach cramps, diarrhea and fever.