1. Learning Target:. Identify the function of the
Learning Target: Identify the function of the structures and organs in the digestive system. Science Starter: Read pg. 48 in your Digestive System Workbook and answer the questions on pg.49 (1-4).

2. Announcements Homework Question of the Day (HW #27 pink)
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Turn to Pg. 16 in your Workbook for Digestive System Notes

3. Digestive System

4. Functions of the Digestive System
Ingestion = food
enters the mouth

5. Functions of the Digestive System
Ingestion = food enters the
mouth
Digestion =
process that breaks
food down into
small molecules

6. Functions of the Digestive System
Ingestion = food enters the
mouth
Digestion = process that
breaks food down into small
molecules
Mechanical
digestion = food is
chewed and churned
Chemical digestion =
breaks down large food
molecules into smaller
molecules to be
absorbed by cells

7. Functions of the Digestive System
Ingestion = food enters the
mouth
Digestion = process that
breaks food down into small
molecules
Absorption =
small molecules of
food are taken into
the body cells

8. Functions of the Digestive System
Ingestion = food enters the
mouth
Digestion = process that
breaks food down into small
molecules
Absorption = small
molecules of food are taken
into the body cells
Elimination =
wastes made of
unabsorbed food
molecules pass out of the body

9. Which is not a function of the digestive system?
Breaking down food into molecules the body can use
Absorbing food molecules into the blood to deliver to the body
Changing waste into molecules the body can use
Eliminating undigested waste from the body

10. Organs of the Digestive Tract
Mouth = digestion starts here

11. Organs of the Digestive Tract
Mouth = digestion starts here
Tongue & teeth mechanically break food up

12. Organs of the Digestive Tract
Mouth = digestion starts here
Tongue & teeth mechanically break food up
Saliva chemically digests food
Saliva = mostly made of
water, also contains
mucus & ptyalin (an
enzyme)

13. Organs of the Digestive Tract
Mouth = digestion starts here
Tongue & teeth mechanically break food up
Saliva chemically digests food
Saliva = mostly made of
water, also contains
mucus & ptyalin (an
enzyme)
When swallowing, epiglottis
(a small flap of tissue) automatically closes over the trachea (windpipe)

14. Organs of the Digestive Tract
Esophagus
Smooth muscles force food into the mucus-lined esophagus
Rhythmic muscular
contractions
(peristalsis) push food
downward

15. Organs of the Digestive Tract
Stomach
Food undergoes mechanical digestion when stomach muscles churn the food
Chemical digestion
happens when hydrochloric
acid (HCl) and pepsin
break down the complex
proteins
Peristalsis pushes the food
toward stomach’s exit

16. Which is not an example of mechanical digestion?
Teeth chewing food
Tongue breaking up food
Smooth muscles in stomach churning food
Pepsin & HCl breaking down proteins

17. What are the muscle contractions that push food through the digestive system called?
Elimination
Peristalsis
Epiglottis
Pepsin

18. What is this structure?
Mouth
Epiglottis
Esophagus
Stomach

19. Organs of the Digestive Tract
Small Intestine (6 meters long)
Most digestion happens here
Intestinal juice
(full of enzymes)
breaks down food

20. Organs of the Digestive Tract
Small Intestine (6 meters long)
Most digestion happens here
Intestinal juice (full of enzymes) breaks down food
Digestive Helpers
Liver = bile is
produced here (Bile
breaks up fats like
dish detergent
breaks up grease)

21. Organs of the Digestive Tract
Small Intestine (6 meters long)
Most digestion happens here
Intestinal juice (full of enzymes) breaks down food
Digestive Helpers
Liver = bile is produced
here (Bile breaks up fats
like dish detergent breaks
up grease)
Gall bladder = bile
is stored here until
released into the small intestine

22. Organs of the Digestive Tract
Small Intestine (6 meters long)
Most digestion happens here
Intestinal juice (full of enzymes) breaks down food
Digestive Helpers
Liver = bile is produced
here (Bile breaks up fats
like dish detergent breaks
up grease)
Gall bladder = bile is
stored here until released
into the small intestine
Pancreas = produces
pancreatic juices that
are released into the small intestine to break down proteins,starches, & fats

23. Organs of the Digestive Tract
Small Intestine (6 meters long)
Most digestion happens here
Intestinal juice (full of
enzymes) breaks down food
Digestive Helpers
Liver
Gall bladder
Pancreas
Digested food is
absorbed through the villi into a network of blood vessels that carry the nutrients to all parts of the body

24. Organs of the Digestive Tract
Small Intestine (6 meters long)
Most digestion happens here
Intestinal juice (full of enzymes)
breaks down food
Digestive Helpers
Liver, Gall bladder, Pancreas
Digested food is absorbed
through the villi into a network of
blood vessels that carry the
nutrients to all parts of the body
e) By the time food leaves the small intestine, it is empty of all nutrients except water

25. Where does most digestion take place?
Mouth
Stomach
Small intestine
Liver

26. Which is true about bile?
Bile breaks down proteins.
Bile is produced in the liver.
Bile is stored in the pancreas.
Bile is released into the stomach.

27. What is this structure?
Liver
Stomach
Gall bladder
Pancreas

28. Organs of the Digestive Tract
Large Intestine (1.5 meters long)
Undigested food spends hours here & most of the water is absorbed

29. Organs of the Digestive Tract
Large Intestine (1.5 meters long)
Undigested food spends hours here & most of the water is absorbed
Helpful bacteria
living in large
intestine make
vitamins K & B

30. Organs of the Digestive Tract
Large Intestine (1.5 meters long)
Undigested food spends hours here & most of the water is absorbed
Helpful bacteria living in
large intestine make vitamins
K & B
Materials not
absorbed form into
solid waste (dead
bacteria, some fat &
protein, undigested
food, dried out parts of
digestive juices & old intestinal cells)

31. Organs of the Digestive Tract
Large Intestine (1.5 meters long)
Undigested food spends hours here & most of the water is absorbed
Helpful bacteria living in large
intestine make vitamins K & B
Materials not absorbed form into
solid waste (dead bacteria,
some fat & protein, undigested
food, dried out parts of digestive
juices & old intestinal cells)
Solid waste passes
into the rectum and is stored until it is eliminated from the body through the anus

32. Which process occurs in the large intestine?
Digested food is absorbed.
Undigested food is absorbed.
Water is added to undigested food.
Water is absorbed from undigested food. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

33. Which structure is the large intestine?B C D A B C D 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

34. What do the bacteria in the large intestine do?
Make you sick
Make bile
Make vitamins
Make food 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

35. Read pgs. 439-441 in your workbook readings!!!
Pg Complete Chart
Pg Answer question #3
(Do not answer math skills question)
If you finish all activities you may:
Work on HW #27
Work on the Word Search on pg. 51