digestive system
TRANSCRIPT
Chapter 8: Digestive and Excretory System
The Digestive System
Digestion
Chapter 8: Digestive and Excretory System
It is the chemical
breakdown of food into smaller
molecules.
Chapter 8: Digestive and Excretory System
ALIMENTARYCANAL
The Alimentary Canal
Chapter 8: Digestive and Excretory System
The food that enters the body sometimes cannot be utilized by
some tissues and cells because some of these
food particles are insoluble in water or they
are really big that they cannot enter the plasma membrane of the cells.
Chapter 8: Digestive and Excretory System
Two General PHASES of DIGESTION
Chapter 8: Digestive and Excretory System
Mechanical
Digestion
Chemical
Digestion
MECHANICAL DIGESTION
Chapter 8: Digestive and Excretory System
CHEMICAL DIGESTION
Chapter 8: Digestive and Excretory System
Groups of molecules commonly encountered during digestion:
• STARCHES – Broken down into glucose molecules
Chapter 8: Digestive and Excretory System
Chapter 8: Digestive and Excretory System
PROTEINS - Broken down into amino acids
Chapter 8: Digestive and Excretory System
• FATS (Lipids) - Broken down into glycerol and fatty acids
Chapter 8: Digestive and Excretory System
• NUCLEIC ACID – Broken down into nucleotides