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)
CB The Digestive System
CO 2 + H 2 OC 6 H O 2 CO 2 + H 2 O C 6 H O 2 light sugar Photosynthesis Cellular Respiration ATP energy ADP
Energy used Energy released Cells store energy in ATP
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.
CB Physical digestion: liquefying of food Chemical digestion: breaking large molecules into small molecules
CB Amylase in mouth Chewing and adding saliva begins the process of liquification Amylase begins the chemical digestion of carbs
CB The primary function of the stomach is food storage
CB Pepsin in stomach Pepsin begins the chemical digestion of proteins. In the stomach liquification continues.
Pepsin in stomach pH enzyme activity basicacid
CB The Digestive System
CB Most chemical digestion occurs in the first part of the small intestine
CB The small intestine has a large surface area to aid in absorbption of nutrients
CB Absorption in the Small Intestine
CB The Digestive System
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
CB Different mouth and teeth structures can tell about an animal’s diet
CB Different mouth and teeth structures can tell about an animal’s diet
Grizzly bear teeth
CB Carnivores have a short digestive system Herbivores have a long digestive system
CB HumansBears Both humans and grizzly bears are omnivores. Our digestive systems can tell us about our ancestors.
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)