Summary Digestive tract

Small intestine


> duodenum ( neutralization of gastric juice , absorption)
-
connected to pyloric part of stomach ( pyloric sphincter t
ampulla of duodenum)

Parts : -

superior duodenal f- lecture

descending part of duodenum → here minor ✗ major duodenal papilla ( for pancreatic + bite duct
-




-
inferior duodenal f-lecture
- horizontal part ( longest part)
-


ascending part of duodenum

-
duodena jejunal f- lecture

structure :




-
inside we can see circular folds

-
3 layers : mucosa ,
submucosa ,
muscular layer ( mucus covered by villi for absorption)


>
Jejunum
-

many folds for absorption
-
blood supply is higher here than ileum because of absorption


> Ileum
-

less f- lectures bc .
no
absorption anymore

-
here more lymph nodes because near ileum faeces is formed and it is needed for microorganisms


Large intestine




Parts :


-

caecum ( vermiform appendix) [ IP]
-

ascending colon [ RP] >
right colic 1- lecture

-
transverse colon [ IP] > left colic f- lecture ( here also transverse mesocolon)

-

descending colon [RP]
[ IP] ( here also sigmoid mesocdon)
-

sigmoid colon

-
rectum ✗ anal canal [ IPTRP]



structures :



-
taenia coli ( taenia libera [not attached to Per] .

,
taenia mesocolica
,
taenia omentalis )

-
haustra ( ridges)

epiploic appendix
-




( on transverse colon)
greater omentum
-




Esophagus :




3 PARTS :



-
cervical ( inferior thyroid a + v1
-
thoracic ( int .
th . a. , bronchial art .
,
v. azyg . + hernia . )
-
abdominal ( left gastric + phrenic atv )