Anaphy Lab
o esophagus,
o stomach,
o small intestine (duodenum,
ACTIVITY 6. Digestive System. jejunum, ileum),
o large intestine (colon), and
o anus.
Digestive system • The GI tract contains food from the
time it is eaten until it is digested
• (dis= apart; gerere= to carry) and absorbed or eliminated.
• is composed of organs that provide • Muscular contractions
for the assimilation of the energy o in the wall of the GI tract
substrates necessary for life as well o physically break down the
as for the elimination of the food by churning it and
unusable components. propel the food along the
• plays a major role in water retention tract, from the esophagus to
and in protecting the body from the anus.
potentially harmful substances if o help to dissolve foods by
ingested. mixing them with fluids
• MAJOR FUNCTION secreted into the tract
o ingestion of food;
o secretion of digestive juices;
o mixing and propulsion of
food; MECHANISM OF GI TRACT
o digestion of food into
small, absorbable
molecules;
o absorption of digestive Tonus ( • sustained
products across the GI tract occurs only in contraction
wall and into the body; and living person) along the
defecation. muscles along
• The digestive system covers: the wall of GI
tract
o the organs of the
• 5 – 7 meters
gastrointestinal (GI) tract
o accessory digestive
organs. Cadaver • 7-9 meters
long
GASTROINTESTINAL TRACT • Loss of muscle
tone after
death
• Also called alimentary canal
• is a tube that extends from the
mouth to the anus through the ACCESSORY ORGANS
thoracic and abdominopelvic
cavities. • Composed of :
• include the o teeth, (aid in the physical
o mouth, breakdown of food)
o most of the pharynx,
, o tongue, (assists in chewing • The organs of the digestive system
and swallowing) are structured to do both.
o salivary glands,
o liver,
o gallbladder, ORGANS OF THE DIGESTIVE SYSTEM
o pancreas
• FUNCTION:
o assist in digestion.
• Except for the teeth and the
tongue, the other accessory
digestive organs never come into
direct contact with food. Instead,
they produce or store secretions
that flow into the GI tract
• Enzymes
o secreted by accessory
digestive organs and cells
that line the tract
o break down the food
chemically
THE ALIMENTARY CANAL ORGANS AND
ACCESORY ORGANS
Gastrointestinal Aid in chemical
Duct breakdown of
food
Teeth Aid in physical
breakdown of
food
TYPES OF DIGESTION
• mechanical digestion
o where food must be
ingested and broken down
into smaller pieces
• chemical ingestion
o the enzymatic breakdown
of large molecules into
smaller ones that can be
used by body cells.
, DIGESTITIVE PROCESSES
LAYERS OF THE GI TRACT AND
PERITONEUM THE HUMAN MOUTH
o esophagus,
o stomach,
o small intestine (duodenum,
ACTIVITY 6. Digestive System. jejunum, ileum),
o large intestine (colon), and
o anus.
Digestive system • The GI tract contains food from the
time it is eaten until it is digested
• (dis= apart; gerere= to carry) and absorbed or eliminated.
• is composed of organs that provide • Muscular contractions
for the assimilation of the energy o in the wall of the GI tract
substrates necessary for life as well o physically break down the
as for the elimination of the food by churning it and
unusable components. propel the food along the
• plays a major role in water retention tract, from the esophagus to
and in protecting the body from the anus.
potentially harmful substances if o help to dissolve foods by
ingested. mixing them with fluids
• MAJOR FUNCTION secreted into the tract
o ingestion of food;
o secretion of digestive juices;
o mixing and propulsion of
food; MECHANISM OF GI TRACT
o digestion of food into
small, absorbable
molecules;
o absorption of digestive Tonus ( • sustained
products across the GI tract occurs only in contraction
wall and into the body; and living person) along the
defecation. muscles along
• The digestive system covers: the wall of GI
tract
o the organs of the
• 5 – 7 meters
gastrointestinal (GI) tract
o accessory digestive
organs. Cadaver • 7-9 meters
long
GASTROINTESTINAL TRACT • Loss of muscle
tone after
death
• Also called alimentary canal
• is a tube that extends from the
mouth to the anus through the ACCESSORY ORGANS
thoracic and abdominopelvic
cavities. • Composed of :
• include the o teeth, (aid in the physical
o mouth, breakdown of food)
o most of the pharynx,
, o tongue, (assists in chewing • The organs of the digestive system
and swallowing) are structured to do both.
o salivary glands,
o liver,
o gallbladder, ORGANS OF THE DIGESTIVE SYSTEM
o pancreas
• FUNCTION:
o assist in digestion.
• Except for the teeth and the
tongue, the other accessory
digestive organs never come into
direct contact with food. Instead,
they produce or store secretions
that flow into the GI tract
• Enzymes
o secreted by accessory
digestive organs and cells
that line the tract
o break down the food
chemically
THE ALIMENTARY CANAL ORGANS AND
ACCESORY ORGANS
Gastrointestinal Aid in chemical
Duct breakdown of
food
Teeth Aid in physical
breakdown of
food
TYPES OF DIGESTION
• mechanical digestion
o where food must be
ingested and broken down
into smaller pieces
• chemical ingestion
o the enzymatic breakdown
of large molecules into
smaller ones that can be
used by body cells.
, DIGESTITIVE PROCESSES
LAYERS OF THE GI TRACT AND
PERITONEUM THE HUMAN MOUTH
