digestive system II Flashcards
What type of excretion do salivary glands use?
exocrine
What is the largest difference between major (parotid, mandibular, zygomatic, sublingual) and minor salivary glands (labial, lingual, buccal)?
Long excretory ducts vs short
Name the 6 features of the salivary gland
Compound Exocrine Lobulated Merocrine Mixed Secrete saliva
What are myoepithelial cells?
Contractile cells around glands inbasal lamina to expel secretion
Is saliva antibacterial?
Yes
What is the structural and functional unit of the gland?
Adenomere
Describe the flow of saliva?
Adenomere intercalated duct striated duct intralobular duct interlobular duct surface epithelium
Is parotid salivary gland mixed, serous, or mucus?
serous only
What two types of tissues look similar?
Parotid (mucus) and pancreas (islets of Langerhan’s)
Where are serous demilunes commonly seen?
Mandibular salivary gland
What is the smallest of the major glands? What is their main product?
Sublingual
Mucin
What are the 3 layers of Tunica Mucosa?
Epithelium
Lamina propria
muscularis mucosa
Where are glands located in the GI tract?
Submucosa
What are the 2 layers of the Tunica muscularis of the GI tract?
Inner circular layer
Outer longitudinal layer
Does espophagus have tunica adventitia or serosa?
Adventitia
Which animals have a stratified squamous keratinized esophagus?
Ruminants
What 2 organs have submucosal glands?
Esophagus
Duodenum
What is the non-glandular part of the stomach?
Esophageal region
What are the glandular parts of the stomach?
Cardia
Fundus
Pylorus
What is the margo plicatus?
transitional line from non-glandular to glandular stomach
What are non-glandular stomachs of the cow?
Rumen
Reticulum
Omasum
What is the epithelium for the ruminant forestomach?
stratified squamous keratinized
Which part of the ruminant forestomach lacks muscularis mucosa in papillae?
Rumen
Does the rume have a lamina propria?
Yes
Where is smooth muscle located in the reticulum papillae?
Tip
What are the layers in omasum formed by Tunica mucosa?
Laminae
How can omasum be differentiated from rumen or reticulum?
Muscularis mucosa present throughout
