chapter 15 digestive system Flashcards
how does the primitive gut developed ?
by the time of folding of the embryo the endoderm
which layer of the gastrola is coaporating in the formation of the primitive gut ?
ENDODERM when the embryo start folding
waht are the 4 parts of the primi gut ?
1-the pharygeal gut 2-foregut 3-med gut
from where the paranchyma of the live and git comes
(endo ,meso , ecto derms)?
the endo derm
what is the 1st part of the foregut ?
the pharangeal gut is important in development of the head and neak
from where the paranchyma of the endo and exocrine of the pancreas comes
(endo ,meso , ecto derms)?
endoderm
Who does the liver start forming ? Free m where is derivative ?
It start like diverticulum from the foregut endoderm called HEPATIC BUD go to the mesoderm of the septum transversum.
How does the bile duct and the gallbladder are formed ?
After forming the hepatic bud the CONNECTION between it and the foregut will narrowing to form the BILE DUCT, then another diverticulom from the bile duct will form to become a gall bladder.
What are the abnormalities related to the gallbladder and bile duct formation?
The 1-intrahepatic gallbladder
2- floating gallbladder fly without mesentery
3- abnormal developed cystic duct
4- =============== gallbladder two or with septum
WHAT IS BILIRY ATRESIA ? Whatis the specific clinical finding ? مهم
Is a condition when the bile duct is blindly close lead to damage of the liver
CLINIC the jaundice neonatal also the must specific is the WHITE STOLE AND DARK URINE it need new liver
What is the PANCREAS DIVISUM ?
Is when the main duct of pancreas open in minor papilae.
Which a supply the midgut derivative?
The superior mesenteric a
How does the must of the intestines which derivative from the midgut are primitively develop ?
The midgut form the U shape loop midgut loop which go under forming changes to give the intestine
What are the parts of the midgut loop are ?what are the derivative of each one ?
1- cranal give the jejunum and the upper part of the ileum
2- the cuadal give the lower ileum the cecum the appendix the ascending and 2/3 of the transverse colon
What is the omphalocele
Is the herniation of the organ into the umbilical ring it can be stomach liver or intestine
What is the condition that the intestine appear due to defect of forming if the abd wall?
GASTROSCHITIS
What we call the newnatal with a bloody stools and symptoms like appendicitis ?
The ilal diverticulum can be as ddx
How can be the intestines go to the right only and the cecum goes to the left iliac fossa or the upper left quadrate ?
Its called NONROTATION IF THE midgut loop mean that the all smole intestine which comes from the cranial part of U LOOP WILL GO RIGHT AND THE CAUDAL SAME
Pancreas FORMATION
The ventral pancreatic bud and dorsal pancreatic bud are direct outgrowths of
foregut endoderm
what is the condition that the stomach and the duodenum appear like a palone in the x ray and clinicaly the newnatel will have tolerant to the feeding ?
anulus pancreas
what abnormal development if the pancreas can occur without any clinical segneficant ?
the assesory duct from the minor papillae
what is the annular pancreas?
is the development abnormality that the ventral and the dorsal pancreas buds fuse to gather around the duodenum
how does the rotation of the midgut loop occur ?
the loop rotate 270 around the SMA counteroclockwise
