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Page 1: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy
Page 2: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

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

Page 3: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

Animals take in complex molecules from the environment for energy production

Page 4: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.21

Physical digestion:liquefying of food

Chemical digestion:breaking large moleculesinto small molecules

Page 5: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.16

Amylasein mouth

Chewing and adding saliva begins the process of liquification

Amylase begins the chemical digestion of carbs

Page 6: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.15

The primary function of the stomach is food storage

Page 7: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.17

Pepsinin stomach

Pepsin begins the chemical digestion of proteins.

In the stomach liquification continues.

Page 8: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

Pepsinin stomach

pH

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acti

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basicacid

Page 9: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.15

The Digestive System

Page 10: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.17

Most chemical digestion occurs in the first part of the small intestine

Page 11: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.23

The small intestine has a large surface area to aid in absorbption of nutrients

Page 12: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.23

Absorptionin the SmallIntestine

Page 13: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.15

The Digestive System

Page 14: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.21

Page 15: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.26

Different mouth and teeth structures can tell about an animal’s diet

Page 16: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.26

Different mouth and teeth structures can tell about an animal’s diet

Page 17: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

Grizzly bear teeth

Page 18: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.27

Carnivores have a short digestive system

Herbivores have a long digestive system

Page 19: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.27

HumansBears

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

Page 20: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 41.15

What happens to the nutrients after absorbtion?

Page 21: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 42.5

Nutrients, Waste, O2, CO2, Water, Minerals, etc must be transported throughout the body

Page 22: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 42.5

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

Page 23: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

In liver,nutrient levelsin blood areregulated

Page 24: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

Fats and lipids move through the lymphatic system, whichreturns fluid to blooddirectly beforeheart

Lymphvessel

smallintestine

CB 41.24

Page 25: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 42.4

Different circulatory systems reflect evolution

Page 26: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 42.5

Mammals have two ciculatory circuits: pulmonary and systemic

Page 27: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB42.9

Blood flows from arteries to capillaries to veins

Page 28: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

CB 42.11

Blood pressure changes as the blood moves from arteries to capillaries

Page 29: During digestion complex molecules are broken down and then used to build needed molecules and to produce energy

For W…


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