Transcript 4/16 - Utexas

This Week:
Digestion and
Nutrition
Next Week:
Plants are Cool
5/2 Exam 3
4/27 bonus 3
4/30 homework 4
(12 pts max)
The Digestive System
CB 41.15
light
Photosynthesis
CO2 + H2O
C6H1206 + O2
sugar
Cellular Respiration
C6H1206 + O2
sugar
CO2 + H2O
energy
ADP
ATP
Cells store
energy in
ATP
Energy used
Energy released
Using ATP
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
Animal digestion
occurs outside of our
cells.
animal and fungal digestion occurs
outside of our cells.
Physical digestion:
liquefying of food
Chemical digestion:
breaking large molecules
into small molecules
CB 41.21
Chewing and adding saliva begins the
process of liquification
Amylase
in mouth
Amylase begins the chemical digestion of
carbs
CB 41.16
The primary function
of the stomach is
food storage
CB 41.15
In the stomach
liquification continues.
Pepsin
in stomach
Pepsin begins
the chemical
digestion of
proteins.
CB 41.17
enzyme activity
Pepsin
in stomach
acid
pH
basic
The Digestive System
CB 41.15
Most chemical
digestion
occurs in the
first part of the
small intestine
CB 41.17
The small intestine has a large surface area to
aid in absorbption of nutrients
CB 41.23
Absorption
in the
Small
Intestine
CB 41.23
The Digestive System
CB 41.15
In liver,
nutrient levels
in blood are
regulated
Fats and lipids
move through the
lymphatic
system, which
returns fluid to
blood
directly before
heart
Lymph
vessel
small
intestine
CB 41.21
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
CB 41.26
Grizzly bear
teeth
Carnivores have a
short digestive system
CB 41.27
Herbivores have a
long digestive system
Bears
Both humans
and grizzly
bears are
omnivores.
Our digestive
systems can
tell us about
our ancestors.
CB 41.27
Humans
This Week:
Digestion and
Nutrition
Next Week:
Plants are Cool
5/2 Exam 3
4/27 bonus 3
4/30 homework 4
(12 pts max)