-
7/21/2019 Human Anatomy : Digestive System
1/70
-
7/21/2019 Human Anatomy : Digestive System
2/70
26-2
General Structure and
Functionsof the Digestive System Organs of the Digestive System
to:
ngest the food!"rans#ort the food! Digest the food into smaller
usa$le
com#onents!
A$sor$ the necessary nutrients intothe $loodstream!
%el the 'aste #roducts from the$ody!
-
7/21/2019 Human Anatomy : Digestive System
3/70
26-(
General Structure and
Functionsof the Digestive System )om#osed of t'o se#arate
categories of organs: digestive organs accessory digestive
organs!
Digestive organs collectively ma*e
u# the: gastrointestinal +G, tract! Also called:
the digestive tract alimentary canal!
-
7/21/2019 Human Anatomy : Digestive System
4/70
4
-
7/21/2019 Human Anatomy : Digestive System
5/70
-
7/21/2019 Human Anatomy : Digestive System
6/70
26-6
General Structure and
Functionsof the Digestive System Accessory digestive organs:
do not form the G tu$e can develo# as outgro'ths are connected
to the G tract +some $y ducts,
Assist the G tract in the digestion of food! nclude:
"eeth "ongue Salivary glands iver Gall$ladder
ancreas
-
7/21/2019 Human Anatomy : Digestive System
7/7026-3
Digestive System
Functions ngestion Digestion: $rea* do'n of large #articles of
food
mechanical digestion chemical digestion
ro#ulsion #eristalsis segmentation
Secretion: digestive en4ymes hormones
A$sor#tion: from e&ternal environment into internal
environment across mucosa
%limination of 'astes +defecation,
-
7/21/2019 Human Anatomy : Digestive System
8/70
8
-
7/21/2019 Human Anatomy : Digestive System
9/7026-/
Oral )avity +mouth, %ntrance to the G tract! nitial site of
digestion:
mechanical digestion +via mastication, chemical digestion +via
en4ymes in saliva,!
5ounded anteriorly $y the teethand li#s 5ounded #osteriorly $y
the oro#haryn&! Su#erior $oundary is formed $y the hard
and soft #alates! Floor or inferior surface of the oral
cavity
the tongue the mylohyoid muscle covered 'ith mucosa!
-
7/21/2019 Human Anatomy : Digestive System
10/70
10
-
7/21/2019 Human Anatomy : Digestive System
11/7026-11
Oral )avity +mouth, "'o regions of the oral cavity
7esti$ule is the s#ace $et'een the chee*s or li#s andthe
gums!
Oral cavity #ro#er! "he lateral 'alls are formed $y the
chee*s!
)ontain $uccinator muscles i#s+la$ia,!
Or$icularis oris muscle
8eratini4ed strati9ed suamous %" Gingivae or gums!
Dense regular )" ;on*eratini4ed %"
a$ial frenulum!
-
7/21/2019 Human Anatomy : Digestive System
12/70
12
-
7/21/2019 Human Anatomy : Digestive System
13/70
13
-
7/21/2019 Human Anatomy : Digestive System
14/70
26-1
