development of the digestive system Flashcards

1
Q

what side of the bi lamiar disk faces the yok sac

A

hypoblast

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2
Q

what side of hte bi laminar dis faces the amiotic cavity

A

epiblast

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3
Q

3 layers of the trailanar disk form superior to inferior

A

ectoderm, mesoderm, endoderm

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4
Q

what plate of the mesoderm gives rise to the gut tube

A

lateral to partial and viceroal mesoderm

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5
Q

what gnee causes the formaitno fo teh gut tube

A

sonic hedge hoge gened

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6
Q

where is the shh gene secred form

A

endodermal cells

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7
Q

how is the oesphagus formed

A

craidal part ofhte gut tube

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8
Q

where does hte lung bud devolp form

A

vental wall of fore gut (gut tube)

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9
Q

what is hte laeyr betweent the traceha nd ospguas during deplpemtn

A

tracheosopgaul ridge

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10
Q

what is the function of hte foregut o the stomahc

A

dilates to form eht somach

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11
Q

at waht poit is the stomach fored

A

week 4

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12
Q

what attahces stomahc in emobly to the the vental and doral wall

A

mesogastrium mesenetary

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13
Q

which way doe sth sotmahc fold

A

along longitudal aces, and pusll doral mesnerary to hte left

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14
Q

what is hte duodenum fored form

A

caudal par tof the foreguat and crainal part of hte midgut

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15
Q

what is formed along sid eh duodenum

A

coelicac turnk and sma

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16
Q

what week is the liver bud formed at

A

3

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17
Q

what is the endoderml oragin cell in liver

A

hepatocyes and bilary epithelia

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18
Q

what is the mesodermal origain cells in the liver

A

kupffer celsl , hepmetopeitc el snad ct cells

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19
Q

what layer of the disk does gall blader and cycdist duct form form

A

endoderm

20
Q

what week does bile form at

A

week 12

21
Q

what dos ehte falicumar liagment and less er moment delpo mform

A

vental mesenatyr

22
Q

where does the spleen origanate from

A

mesoderm

23
Q

what week is the spleat

A

5

24
Q

what week is the spleen colonsied by t lymphocyes

A

15-17

25
Q

what week is hte b clel sprecorues arrive and the spleen starts its lymphoid funtion

A

week 23

26
Q

where does th pancrease origin form

A

endoderm

27
Q

what week does hte pancrease develop

A

week 4

28
Q

how does ht pancrease roate

A

back and towards left side of the body at week 6

29
Q

oseophageal atresia

A

meaning tehat the ospagua is randomly closed

30
Q

trachemoosphgal fisutreal

A

the osphgaus is connected to the trachea still

31
Q

what directio doe shte inteis al loops go to form

A

anticloackwise

32
Q

what is hte viteline duct

A

connects yolk sack to mid gut for fecal devopment

33
Q

what is hte the week vietline duct disaperas

A

weeks 12- 14, it disoced at week 6

34
Q

what is aboalriaotain of hte midgut

A

small intisn on right side and large intes on the left side

35
Q

what is revered ratin ofhte midgut

A

the dudenum goes in front ofthe tranverse colon, no behind it

36
Q

what is a omphalecle

A

the failur o fhte retaio of the hernaied intesial loops at week 12

37
Q

what are the forms of remiants of the vitelline duct

A

merkesl divercil, vitelline cyst , vitellium fistula

38
Q

what is form the endodermal origina

A

distal 1/3rd tranverse colon, decding colon, sigmoid colon, rectum and upper part of the anal canal

39
Q

what is the ecto dermal origan of the hind gut

A

lower part of hte anal canl and anla orrifice

40
Q

what us the cloacla membaren

A

tube that form blder and uteres which rupures at week 7

41
Q

what is the urorectal fistula

A

where the anus joins with urela and is not formed forely

42
Q

what is the gertoviaginal firus,

A

anus jon with vigina

43
Q

what is the retroperinal fistual

A

in propopar form of rectal canla

44
Q

what is the interforated antus

A

anus does not form

45
Q
A