Digestive System Part 2 Flashcards
Anterior opening of the oral cavity is called the _____
oral orifice
What cells make up the walls of the oral cavity?
stratified epithelium
the lips/labia are composed of fleshy ________ _______ muscle
orbicularis oris
the cheeks are composed of what muscle
buccinator
what is the oral vestibule?
the space between the lips/cheeks and the teeth
What is considered the oral cavity proper?
Lies between the teeth and gums
What comprises the hard palate?
The palatine bones and palatine processes
What muscle makes up the soft palate?
skeletal muscle
The uvula is an extension of the _____ ______ and closes ____________ during swallowing.
soft palate; nasopharynx
What are the two arches in the oral cavity called? What is the space between them called and the tonsil between them?
palatoglossal arch and palatopharyngeal arch
space: fauces, palatine tonsil
What do tonsils do?
produce mucous and saliva
What are the functions of saliva?
- cleanse mouth
- dissolves food chemicals
- moistens food
- begins starch breakdown (amylase)
What are the 4 structures of the tongue and the sulcus?
- filiform papillae
- fungiform papillae
- vallate papillae
- foliate papillae
sulcus= terminal sulcus behind vallate
What is the function of the tongue?
- taste
- move food around
- formation of bolus
What are the 3 salivary glands? What cell type do each contain?
Parotid (serous)
Submandibular (serous)
Sublingual (mucus)
There are 2 types of secretory cells. What are the two types and what do each of them secrete?
Serous : watery secretions, enzymes, ions, and bits of mucin
Mucus : produce mucous
What is the function of incisors?
cutting
What is the function of canines/bicuspids?
tearing
What is the function of premolars?
grinding and crushing
What is the function of molars?
best grinders
What are the structures of the tooth?
Crown, Neck, Root
Pulp cavity, root canal, gingival sulcus
cement, periodontal ligament, dentin
What are the structures of the tooth?
Crown, Neck, Root
Pulp cavity, root canal, gingival sulcus
cement, periodontal ligament, dentin
What type of epithelium makes up the pharynx?
stratified squamous epithelium
The pharynx is lined with _____ glands
mucous
The inner muscle of the pharynx runs _____ while the outer muscles run _____.
longitudinally; circularly
The pharynx is comprised of _____ muscle and is ________
skeletal; voluntary
The function of the pharynx is to….
- allow passage of food, fluids, and air
The esophagus runs from the ______ to the _______
laryngopharynx to the stomach (cardiac sphincter)
Which sphincter protects from acid reflux
cardiac sphincter
TRUE or FALSE:
The esophagus has all four alimentary canal tunics
TRUE
