GI Embryohisto- Reynolds Flashcards
4 layers of digestive tract tube
Ms&Ms
Mucosa
subMucosa
Muscularis Externa
Serosa/Adventitia
The Mucosa is the most varied layer and has three main functions:
Protection, Secretion, Absorption
There are three layers of the Mucosa:
Epithelium is the…
Lamina propia is the..
Muscularis mucosae is the…
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
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.
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.
The Submucosa layer of the digestive tract is the layer containing_______.
It is composed of:
The Submucosa layer of the digestive tract is the layer containing mucosal fxn.
Composed of: Irregular LCT, DCT, Blood&lymph vessels, nerves, glands
The third layer of the Digestive tract, the Muscularis Externa, creates the _______ that is essential for mechanical digestion.
It is composed of:
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
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 _______ _______ _______
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
The _______ causes the stomach to rotate 90 degrees during the 6th week of development.
The liver causes the stomach to rotate 90 degrees during the 6th week of development.
After the midgut has rotated _______ degrees total.
Where does a large portion of the small intestine lie?
After the midgut has rotated 270 degrees total.
Where does a large portion of the small intestine lie?
Outside body in umbilicus
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.
Meckel’s diverticulum
Anal atresia
Persistant anal membrane= no anal opening.
Dorsal and ventral buds of pancreas fail to fuse
Annular pancreas
An infant is born or aborted with its guts herniated on teh outside of the body with no skin cover.
Gastroschisis
Layers of digestive tract including layers of mucosa in order
Epithelium
Lamina Propia
Muscluaris mucosae
Sub Mucosa
Muscularis externa
Serosa/adventitia
Which layer generates peristalsis?
Muscluaris externa