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