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The Alimentary Canal and
By Aida Rogonich and Takara Reed
[Didas & TK]
Alimentary Canal/ Digestive Canal
• Mouth
• Pharynx
• Esophagus
• Stomach
• Small & Large Intestines
• Food is taken in
• Grinded by teeth
• Mixed with saliva
– Comes from 3 large glands
• Parotid
• Submaxillary
• Sublingual
• Food passes through the pharynx
• Like a muscular membrane behind the nose
and mouth which helps process food
• Muscle contractions occur
• Food is pushed down into/through the
• After food passes through the esophagus by
mucus and muscle contractions it enters the
– cardiac orfice
• Strong gastric juices mix with the mucus and
muscle contractions help fully digest and
dissolve food
– 2-4 hours
• From stomach the food is further digested
here and then goes through to the
• Then fluids flow through the pancreatic duct
– Urination
• And solids flow through the bile duct
– Wastes
• 30 feet long in humans
• Imagine that you put one end of a hose in
your mouth and kept threading it through
until it came out of your butt. That's more or
less what the alimentary canal is
Reasons For Cellulose not being
• Humans/ mammals don’t
contain the symbiotic
anaerobia bacteria needed
to produce enzymes to
breakdown the cellulose
• Cellulose binds so strongly
to each other. This makes
cellulolysis relatively
difficult compared to the
breakdown of other
• Cellulose main use is as
dietary fiber or “roughage”
• We eat some plants and the cellulose we
take in is used to clear up our intestine; push
out wastes
• It contains no essential proteins or such
necessary, like other sugars
• It’s bonds cannot be broken down by the
fluids and muscle contractions part of the