Digestive System Flashcards
What are the 3 surfaces of the lip
The cutaneous (outer part) the Vermillion, (red border) and Inner oral mucosa
Outer thin skin has what
Hair follicles, sebaceous glands, and sweat glands
The vermillion border is where the skin change from…
Transitional zone between skin and oral mucosa
The vermillion border is lined by what epithelium
Stratified squamous epi, no apocrine gland on lip
Lips are pink because
Translucent epi and lots of blood vessels
Inner lips is lined by
By NONkeratinized stratified squamous epi
Two parts of the tongue are known as
Anterior (oral) tongue 2/3 and posterior (pharyngeal) 1/3
What are the four types of papillae on the anterior tongue
Filiformes - entire dorsal of tongue (top)
Fungi form
Circunvalent
Foliate
What are the two lingual papillae
Filiform - Cone shaped and most numerous - manipulate food and increase friction
Fungi form mushroom shaped, near tip of tongue
There is also a 3rd lingual papillae called
Circunvalate papillae - largest
Taste buds are found on what papillae
Fungi form and circumvallate papillae
What forms the roof of the mouth and is called the masticatory mucosa
The Hard palate
The posterior part of the palate is called and serves what purpose
The soft palate and closes off the nasopharynx and oropharynx during swallowing
How many pairs of major salivary glands
3
What are the names of the 3 salivary glands
Parotid, submandibular, sublingual, make about 3 wine bottles worth of wine
What makes up saliva
Enzymes, ions, and antibodies
Tubuloacinar glands make up what?
Salivary glands
Esophagus connects the
Pharynx and the stomach
What are the 4 layers of the esophagus
Mucosa, submucosa, muscularis externa, adventia
The mucosa layers gets divided into 3 more layers
Epithelium, lamina propia, then muscularis mucosa
Epithelium is thick in the esophagus because
It protects from friction, abrasion, and injury
The Auerbach plexus is found where
Between the two layers of muscularis externa
Two glands in the esophagus and what they produce
Superficial glands - produce neutral mucin
Submucosal glands - produce acidic mucin
Where the esophagus meets the stomach
The z line - change from nonkerat strat sqam to simple columnar epi
What is the most common site of esophageal cancer
At the z line
What are the four layers of the stomach
Mucosa, submucosa, muscularis externa and serosa
The lumen of the stomach is made up of
Simple columnar epi
Foveola are unique to what part of the digestive tract (dips that allow for secretion of mucous, acid and digestive enzymes)
The stomach
Three parts of galstric glands in the stomach
Isthmus - open into gastric pit
Mid region - mixture of mucous neck cell and parietal chell
Body contains parietal cells and gastric chief cells
Brunner glands are found where
In the gastroduodenal jtn and secrete mucous
What is a distinct feature of the ilium
Large amounts of get associated lymph tissue
Panera cells and Peyers patches are found where in the DIG tract
Iulium
What produces lysozyme which regulate bacterial microenvironment
Paneth cells
What produces protective mucous in intestine
Goblet cells
What plays a role in breakdown of ingested nutrients
Enterocytes
Divets in the haustra are called
Plicae semilunaris
The large intestine lacks what
Villi
