Digestive System: Salivary Glands

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What is the orientation of fiber in the inner layer of the esophagus?

Spiral

Longitudinal

Circular (correct)

Oblique

Which nervous system is responsible for the innervation of the alimentary canal?

Somatic nervous system

Enteric nervous system (correct)

Peripheral nervous system

Central nervous system

What is the function of the esophageal glands?

To absorb nutrients

To produce digestive enzymes

To lubricate and protect the mucosa (correct)

To produce hormones

What type of epithelial lining is present in the esophageal mucosa?

Stratified squamous epithelium Signup and view all the answers

What is the composition of the muscularis externa in the upper third of the esophagus?

Bundles of skeletal muscle fibers Signup and view all the answers

What is the composition of the muscularis externa in the lower third of the esophagus?

Only smooth muscle fibers Signup and view all the answers

What is the function of the esophagus?

To transport swallowed material from the pharynx to the stomach Signup and view all the answers

What is the type of connective tissue that covers the short segment of the esophagus below the diaphragm?

Loose connective tissue Signup and view all the answers

What is the location of the neurons that innervate the alimentary canal?

In Meissner and Auerbach plexuses Signup and view all the answers

What is the name of the layer that covers the short segment of the esophagus below the diaphragm?

Serosa Signup and view all the answers

What type of epithelium is present in the vermilion zone of the lips?

Thin stratified squamous lightly keratinized epithelium Signup and view all the answers

What type of muscle is found in the core of the lips?

Striated muscle Signup and view all the answers

What is the function of the minor labial salivary glands?

To produce mucous for lubrication Signup and view all the answers

What is the structure that covers the short segment of the tongue?

Mucous membrane Signup and view all the answers

What is the characteristic of the dermis in the vermilion zone?

Rich in sensory innervation and blood capillaries Signup and view all the answers

What type of epithelium is present in the oral mucosa of the lips?

Wet stratified squamous non-keratinized epithelium Signup and view all the answers

What is the function of the deep dermal papillae in the vermilion zone?

To increase sensation and blood flow Signup and view all the answers

What is the characteristic of the connective tissue core of the lips?

Dense irregular collagenous connective tissue Signup and view all the answers

What type of glands are present near the inner surface of the lips?

Minor labial salivary glands Signup and view all the answers

What is the composition of the tongue?

A mass of striated muscle covered by a mucous membrane Signup and view all the answers