Transcript
7/27/2019 Embryology of the Gut
1/47
EMBRYOLOGY OF THE GIT
7/27/2019 Embryology of the Gut
2/47
7/27/2019 Embryology of the Gut
3/47
7/27/2019 Embryology of the Gut
4/47
Parts of the Gut
The gut has three(3) parts:
Foregut.within the head fold
Midgut..in the middle andcommunicate with the yolk sac by
Vitelline duct.
Hindgut.within the tailfold
7/27/2019 Embryology of the Gut
5/47
7/27/2019 Embryology of the Gut
6/47
7/27/2019 Embryology of the Gut
7/47
Foregut
The most rostral part forms the oralcavity and the embryonic pharynx.
The following part forms theesophagus,and gives rise to Respiratorydiverticulum.The wide communicationbetween the two is partitioned bytracheoesophageal septum.
The caudal part of foregut forms thestomach and the upper part ofDuodenum.
7/27/2019 Embryology of the Gut
8/47
Oral Cavity
Stomatodeum: primitive mouth. Oropharyngeal
membrane, ruptures at the 5th week.
Development of the tongue: Lingual
(mandibular) swellings + tuberculum impar +
Hypobrancheal eminence (copula)
Development of the palate
Linguo-gingival and labio-gingival sulci, gum
and dental lamina and development of the teeth
7/27/2019 Embryology of the Gut
9/47
7/27/2019 Embryology of the Gut
10/47
7/27/2019 Embryology of the Gut
11/47
7/27/2019 Embryology of the Gut
12/47
Salivary glands
The salivary glands arise bilaterally as theresult of epithelialmesenchymal interactionsbetween the ectodermal epithelial lining of theoral cavity and the subjacent neural crest-derived mesenchyme.
They form as solid diverticula that undergobranching morphogenesis, the whole tree-likestructure later acquiring a lumen.
The blind ends of the branches form acini,whose cells differentiate firstly to form serouscells and, postnatal, mucus-secreting cells(except for the parotid gland, which remainsmainly or entirely serous).
7/27/2019 Embryology of the Gut
13/47
7/27/2019 Embryology of the Gut
14/47
7/27/2019 Embryology of the Gut
15/47
7/27/2019 Embryology of the Gut
16/47
7/27/2019 Embryology of the Gut
17/47
7/27/2019 Embryology of the Gut
18/47
7/27/2019 Embryology of the Gut
19/47
7/27/2019 Embryology of the Gut
20/47
7/27/2019 Embryology of the Gut
21/47
7/27/2019 Embryology of the Gut
22/47
7/27/2019 Embryology of the Gut
23/47
7/27/2019 Embryology of the Gut
24/47
7/27/2019 Embryology of the Gut
25/47
7/27/2019 Embryology of the Gut
26/47
7/27/2019 Embryology of the Gut
27/47
7/27/2019 Embryology of the Gut
28/47
7/27/2019 Embryology of the Gut
29/47
7/27/2019 Embryology of the Gut
30/47
7/27/2019 Embryology of the Gut
31/47
7/27/2019 Embryology of the Gut
32/47
7/27/2019 Embryology of the Gut
33/47
7/27/2019 Embryology of the Gut
34/47
7/27/2019 Embryology of the Gut
35/47
7/27/2019 Embryology of the Gut
36/47
7/27/2019 Embryology of the Gut
37/47
7/27/2019 Embryology of the Gut
38/47
7/27/2019 Embryology of the Gut
39/47
7/27/2019 Embryology of the Gut
40/47
7/27/2019 Embryology of the Gut
41/47
7/27/2019 Embryology of the Gut
42/47
7/27/2019 Embryology of the Gut
43/47
CONGENITAL ABNORMALITIES
Vitelline duct abnormalities :
Meckels diverticulum
EnterocystomaUmbilical fistula
OmphaloceleCongenital umbilical hernia
7/27/2019 Embryology of the Gut
44/47
7/27/2019 Embryology of the Gut
45/47
7/27/2019 Embryology of the Gut
46/47
7/27/2019 Embryology of the Gut
47/47
top related