GI Embryohisto- Reynolds Flashcards

1
Q

4 layers of digestive tract tube

Ms&Ms

A

Mucosa

subMucosa

Muscularis Externa

Serosa/Adventitia

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2
Q

The Mucosa is the most varied layer and has three main functions:

A

Protection, Secretion, Absorption

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3
Q

There are three layers of the Mucosa:

Epithelium is the…

Lamina propia is the..

Muscularis mucosae is the…

A

There are three layers of the Mucosa:

Epithelium is the… barrier, alters surface area, premits movment of nutrient, water&electrolytes

Lamina propia is the… LCT containing glands, vessels for transport, immune components

Muscularis mucosae is the… Thin SM layer in circular&longitudinal arrangement

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4
Q

The oral cavity, pharynx, and esophagus are line with _______ _______ epithelium to deal with the mechanical stress.

Stomach, small intestines, and most of large intestines are lined with _______ _______ epithelium for absorption and mucous secretion.

A

The oral cavity, pharynx, and esophagus are line with stratified squamous epithelium to deal with the mechanical stress.

Stomach, small intestines, and most of large intestines are lined with simple columnar epithelium for absorption and mucous secretion.

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5
Q

The Submucosa layer of the digestive tract is the layer containing_______.

It is composed of:

A

The Submucosa layer of the digestive tract is the layer containing mucosal fxn.

Composed of: Irregular LCT, DCT, Blood&lymph vessels, nerves, glands

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6
Q

The third layer of the Digestive tract, the Muscularis Externa, creates the _______ that is essential for mechanical digestion.

It is composed of:

A

The third layer of the Digestive tract, the Muscularis Externa, creates the peristalsis that is essential for mechanical digestion.

It is composed of: inner circular SM, CT, outer longitudinal SM

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7
Q

The fourth layer of the digestive tract, the Serosa/Adventitia, which reduces _______ _______.

The serosa layeris an overylying epithelial layer for the…

The adventitia layer is the outermost layer that adheres to the body wall and consists of a _______ _______ _______

A

The fourth layer of the digestive tract, the Serosa/Adventitia, which reduces frictional forces.

The serosa layeris an overylying epithelial layer for the… esophagus, stomach, small intestines, and some of large intestines(everything but oral cavity

The adventitia layer is the outermost layer that adheres to the body wall and consists of a connective tissue layer

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8
Q

The _______ causes the stomach to rotate 90 degrees during the 6th week of development.

A

The liver causes the stomach to rotate 90 degrees during the 6th week of development.

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9
Q

After the midgut has rotated _______ degrees total.

Where does a large portion of the small intestine lie?

A

After the midgut has rotated 270 degrees total.

Where does a large portion of the small intestine lie?

Outside body in umbilicus

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10
Q

This disease is twice as common in males and is when the Vitelline duct does not regress and persists. Omphalo- means related to umbilicus and this disease can cause omphalomesenteric fistula, omphalomesenteric cyst, or omphalomesenteric ligament connecting the small bowel and umbilicus.

A

Meckel’s diverticulum

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11
Q

Anal atresia

A

Persistant anal membrane= no anal opening.

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12
Q

Dorsal and ventral buds of pancreas fail to fuse

A

Annular pancreas

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13
Q

An infant is born or aborted with its guts herniated on teh outside of the body with no skin cover.

A

Gastroschisis

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14
Q

Layers of digestive tract including layers of mucosa in order

A

Epithelium

Lamina Propia

Muscluaris mucosae

Sub Mucosa

Muscularis externa

Serosa/adventitia

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15
Q

Which layer generates peristalsis?

A

Muscluaris externa

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16
Q

Layer that reduces frictional forces?

A

Serosa

Adventitisa- anchors too

17
Q

Thin layer of smooth mm cells in circular & longitudinal arrangement

A

Muscularis mucosae

18
Q

The growing _______ enlongates faster than abdominal cavity causing the midgut into a hairpin fold called the primary intestinal loop

A

The growing ileum enlongates faster than abdominal cavity causing the midgut into a hairpin fold called the primary intestinal loop

19
Q

Pressure from other abdominal organs results in what for the primary intestinal loop?

A

Causes it to herniate into umbilicus

20
Q

Volvulus

A

Twisting of intestine

21
Q

Persistant cloaca

A

Rectum, uterus, and bladder all exiting through same opening.

22
Q

Membrane covers anus at birth

A

Persistant anal membrane

23
Q

Omphalocele

A

Herniation of abdominal viscera through enlarged umbilical ring with SKIN COVER