2. During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

3. Animals take in complex molecules from the environment for energy production

4. CB 41.21 Physical digestion: liquefying of food Chemical digestion: breaking large molecules into small molecules

5. CB 41.16 Amylase in mouth Chewing and adding saliva begins the process of liquification Amylase begins the chemical digestion of carbs

6. CB 41.15 The primary function of the stomach is food storage

7. CB 41.17 Pepsin in stomach Pepsin begins the chemical digestion of proteins. In the stomach liquification continues.

8. Pepsin in stomach pH enzyme activity basicacid

9. CB 41.15 The Digestive System

10. CB 41.17 Most chemical digestion occurs in the first part of the small intestine

11. CB 41.23 The small intestine has a large surface area to aid in absorbption of nutrients

12. CB 41.23 Absorption in the Small Intestine

13. CB 41.15 The Digestive System

14. CB 41.21

15. CB 41.26 Different mouth and teeth structures can tell about an animal’s diet

16. CB 41.26 Different mouth and teeth structures can tell about an animal’s diet

17. Grizzly bear teeth

18. CB 41.27 Carnivores have a short digestive system Herbivores have a long digestive system

19. CB 41.27 HumansBears Both humans and grizzly bears are omnivores. Our digestive systems can tell us about our ancestors.

20. CB 41.15 What happens to the nutrients after absorbtion?

21. CB 42.5 Nutrients, Waste, O 2, CO 2, Water, Minerals, etc must be transported throughout the body

22. CB 42.5 Capillaries provide the large surface area required for these exchanges to take place.

23. In liver, nutrient levels in blood are regulated

24. Fats and lipids move through the lymphatic system, which returns fluid to blood directly before heart Lymph vessel small intestine CB 41.24

25. CB 42.4 Different circulatory systems reflect evolution

26. CB 42.5 Mammals have two ciculatory circuits: pulmonary and systemic

27. CB 42.9 Blood flows from arteries to capillaries to veins

28. CB 42.11 Blood pressure changes as the blood moves from arteries to capillaries

29. For W…