20 Questions
What is the orientation of fiber in the inner layer of the esophagus?
Circular
Which nervous system is responsible for the innervation of the alimentary canal?
Enteric nervous system
What is the function of the esophageal glands?
To lubricate and protect the mucosa
What type of epithelial lining is present in the esophageal mucosa?
Stratified squamous epithelium
What is the composition of the muscularis externa in the upper third of the esophagus?
Bundles of skeletal muscle fibers
What is the composition of the muscularis externa in the lower third of the esophagus?
Only smooth muscle fibers
What is the function of the esophagus?
To transport swallowed material from the pharynx to the stomach
What is the type of connective tissue that covers the short segment of the esophagus below the diaphragm?
Loose connective tissue
What is the location of the neurons that innervate the alimentary canal?
In Meissner and Auerbach plexuses
What is the name of the layer that covers the short segment of the esophagus below the diaphragm?
Serosa
What type of epithelium is present in the vermilion zone of the lips?
Thin stratified squamous lightly keratinized epithelium
What type of muscle is found in the core of the lips?
Striated muscle
What is the function of the minor labial salivary glands?
To produce mucous for lubrication
What is the structure that covers the short segment of the tongue?
Mucous membrane
What is the characteristic of the dermis in the vermilion zone?
Rich in sensory innervation and blood capillaries
What type of epithelium is present in the oral mucosa of the lips?
Wet stratified squamous non-keratinized epithelium
What is the function of the deep dermal papillae in the vermilion zone?
To increase sensation and blood flow
What is the characteristic of the connective tissue core of the lips?
Dense irregular collagenous connective tissue
What type of glands are present near the inner surface of the lips?
Minor labial salivary glands
What is the composition of the tongue?
A mass of striated muscle covered by a mucous membrane
This quiz covers the functions and structure of salivary glands, including minor and major salivary glands, secretory units, and types of acini.
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