during digestion complex molecules are broken down and then used to build needed molecules and to...
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During digestion complex molecules are broken down and then used to build needed molecules and to produce energy
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Animals take in complex molecules from the environment for energy production
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CB 41.21
Physical digestion:liquefying of food
Chemical digestion:breaking large moleculesinto small molecules
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CB 41.16
Amylasein mouth
Chewing and adding saliva begins the process of liquification
Amylase begins the chemical digestion of carbs
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CB 41.15
The primary function of the stomach is food storage
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CB 41.17
Pepsinin stomach
Pepsin begins the chemical digestion of proteins.
In the stomach liquification continues.
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Pepsinin stomach
pH
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me
acti
vity
basicacid
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CB 41.15
The Digestive System
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CB 41.17
Most chemical digestion occurs in the first part of the small intestine
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CB 41.23
The small intestine has a large surface area to aid in absorbption of nutrients
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CB 41.23
Absorptionin the SmallIntestine
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CB 41.15
The Digestive System
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CB 41.21
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CB 41.26
Different mouth and teeth structures can tell about an animal’s diet
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CB 41.26
Different mouth and teeth structures can tell about an animal’s diet
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Grizzly bear teeth
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CB 41.27
Carnivores have a short digestive system
Herbivores have a long digestive system
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CB 41.27
HumansBears
Both humans and grizzly bears are omnivores.Our digestive systems can tell us about our ancestors.
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CB 41.15
What happens to the nutrients after absorbtion?
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CB 42.5
Nutrients, Waste, O2, CO2, Water, Minerals, etc must be transported throughout the body
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CB 42.5
Capillaries provide the large surface area required for these exchanges to take place.
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In liver,nutrient levelsin blood areregulated
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Fats and lipids move through the lymphatic system, whichreturns fluid to blooddirectly beforeheart
Lymphvessel
smallintestine
CB 41.24
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CB 42.4
Different circulatory systems reflect evolution
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CB 42.5
Mammals have two ciculatory circuits: pulmonary and systemic
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CB42.9
Blood flows from arteries to capillaries to veins
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CB 42.11
Blood pressure changes as the blood moves from arteries to capillaries
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