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Final

BIOL 205 Study Guide - Final Guide: Hard Palate, Keratin, Mucin

5 pages48 viewsSpring 2017

Department
Biology
Course Code
BIOL 205
Professor
Susan Polich
Study Guide
Final

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Type of Tissues in Digestive System Organs
Oral Cavity
Nonkeratinized stratified squamous epithelium-
Epithelial lining of oral cavity: Protects against abrasive
activities associated with digestion
Keratinized stratified squamous epithelium- The lips:
reduced amount of keratin within outer epithelial layer
(reason why lips have a reddish hue)
Dense irregular connective tissue; Nonkeratinized
stratified squamous epithelium- Gingivae (gums): covers
alveolar processes of upper and lower jaws and
surrounds necks of the teeth
Dense connective tissue; Nonkeratinized stratified
squamous epithelium- Hard palate: exhibits prominent
transverse palatine folds (friction ridges) that assist the
tongue in manipulating ingested materials prior to
swallowing
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Skeletal muscle; Nonkeratinized stratified squamous
epithelium- Soft Palate (along with uvula): elevates when
swallowing to close off the posterior entrance into the
nasopharynx and prevent ingested materials from
entering the nasal region
Skeletal muscle; Stratified squamous epithelium- Tongue:
is keratinized over the filiform papillae, but
nonkeratinized over the rest of the tongue; Pushes
material against palate to turn it into a bolus; detects
taste
Dense connective tissue; Nonkeratinized stratified
squamous epithelium- Hard palate: Forms anterior 2/3 of
roof of mouth; separates oral cavity from nasal cavity
Pharynx
Nonkeratinized stratified squamous epithelium-
Oropharynx and laryngopharynx: Provides
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