chapter 15 digestive system

Question 1

how does the primitive gut developed ?

Answer 1

by the time of folding of the embryo the endoderm

Question 2

which layer of the gastrola is coaporating in the formation of the primitive gut ?

Answer 2

ENDODERM when the embryo start folding

Question 3

waht are the 4 parts of the primi gut ?

Answer 3

1-the pharygeal gut 2-foregut 3-med gut

Question 4

from where the paranchyma of the live and git comes

(endo ,meso , ecto derms)?

Answer 4

the endo derm

Question 5

what is the 1st part of the foregut ?

Answer 5

the pharangeal gut is important in development of the head and neak

Question 6

from where the paranchyma of the endo and exocrine of the pancreas comes
(endo ,meso , ecto derms)?

Answer 6

endoderm

Question 7

Who does the liver start forming ? Free m where is derivative ?

Answer 7

It start like diverticulum from the foregut endoderm called HEPATIC BUD go to the mesoderm of the septum transversum.

Question 8

How does the bile duct and the gallbladder are formed ?

Answer 8

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.

Question 9

What are the abnormalities related to the gallbladder and bile duct formation?

Answer 9

The 1-intrahepatic gallbladder
2- floating gallbladder fly without mesentery
3- abnormal developed cystic duct
4- =============== gallbladder two or with septum

Question 10

WHAT IS BILIRY ATRESIA ? Whatis the specific clinical finding ? مهم

Answer 10

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

Question 11

What is the PANCREAS DIVISUM ?

Answer 11

Is when the main duct of pancreas open in minor papilae.

Question 12

Which a supply the midgut derivative?

Answer 12

The superior mesenteric a

Question 13

How does the must of the intestines which derivative from the midgut are primitively develop ?

Answer 13

The midgut form the U shape loop midgut loop which go under forming changes to give the intestine

Question 14

What are the parts of the midgut loop are ?what are the derivative of each one ?

Answer 14

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

Question 15

What is the omphalocele

Answer 15

Is the herniation of the organ into the umbilical ring it can be stomach liver or intestine

Question 16

What is the condition that the intestine appear due to defect of forming if the abd wall?

Answer 16

GASTROSCHITIS

Question 17

What we call the newnatal with a bloody stools and symptoms like appendicitis ?

Answer 17

The ilal diverticulum can be as ddx

Question 18

How can be the intestines go to the right only and the cecum goes to the left iliac fossa or the upper left quadrate ?

Answer 18

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

Question 19

Pancreas FORMATION

Answer 19

The ventral pancreatic bud and dorsal pancreatic bud are direct outgrowths of
foregut endoderm

Question 20

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 ?

Answer 20

anulus pancreas

Question 21

what abnormal development if the pancreas can occur without any clinical segneficant ?

Answer 21

the assesory duct from the minor papillae

Question 22

what is the annular pancreas?

Answer 22

is the development abnormality that the ventral and the dorsal pancreas buds fuse to gather around the duodenum

Question 23

how does the rotation of the midgut loop occur ?

Answer 23

the loop rotate 270 around the SMA counteroclockwise