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A&P Digestion

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Functions of the Digestive System
Ingestion, Peristalsis, Digestion mechanical, chewing, Absorption of nutrients, and Defecation of waste
Features of the Mouth
Vestibule, Oral Cavity, Hard Plate, Soft Plate; Uvula, Tongue, Stratified Squamous Epithelium
Vestibule
Space between the lips and the teeth
Oral Cavity
Behind the teeth
Hard Plate
Rough of mouth
Soft Plate
Forms a muscular arch, which extends posteriorly and downward as cone shape projection called the Uvula
Tongue
Thick muscular organ, located on the floor of the mouth, composed of extrinsic and intrinsic muscles
Extrinsic Muscles
outside of tongue and moves into it
Intrinsic Muscles
Inside of tongue, criss crossing across tongue, composed of skeletal muscles
Tooth Structure
Enamel, Dentine, Pulp Cavity, Root, Crown, Gingiva, Alveolar Process, Root Canal, Periodontal Ligament, Cementum
Permanent Teeth: Types and #
Incisors (2), Cuspids-Canine (1), Bicuspids (2), Molars (3)
Incisors
Cutting, 2
Cuspids (Canine)
Tearing, 1
Bicuspids
Grinding, 2
Molars
Grinding, 3
How many Permanent Teeth
Total of 32
Deciduous Teeth
Incisor (2), Cuspid (1), Molar (2)
Total # of Deciduous Teeth
A total of 20
Salivary Gland
Exocrine glands, Secretions: Mucous, Serous
Mucous
Thick and sticky, sympathetic stimulation
Serous
Watery, contains alpha amylase, parasympathetic stimulation
Types of Salivary Glands
Parotid Gland, Submadibular gland, Sublingual Gland
Parotid Gland
Secretes serous, duct by upper 2nd molar
Submandibular Gland
Mostly secretes serous and mucous, opens near frenulum
Sublingual Gland
Mostly mucous and serous, multiple ducts at Lateral base of tongue
Function of Pharynx
Common place for air and food
Location of Pharynx
Behind nasal cavity