Gastrointestinal System Overview Flashcards
What is the gastrointestinal tract?
A continuous ‘tube’ commencing at the oral cavity and ending at the anus
What are the two components of the GI tract in the head region?
Oral cavity and Pharynx
What are the two components of the GI tract in the neck region
Pharynx and Oesophagus
What is the one component of the GI tract in the thorax?
Oesophagus
What are the 4 components of the GI tract in the abdomen region?
Stomach, small intestine, most of the large intestine, most accessory organs of the GI tract
What is the one component of the GI tract in the pelvis region?
Rectum
What are the two components of the GI tract that are in the perineum region?
Anal canal and Anus
What are the 3 functions of the GI system?
- introduce food into the body
- Digest and absorb nutrients and toxins
- Excrete residual waste out of the body
4 functions of the oral cavity
Sensing
Salivation
Chewing
Initiating swallow
3 functions of the pharynx
Defence against infection (tonsils)
Swallowing
Airway protection
Function of the oesophagus
Transit from pharynx to stomach
3 functions of the stomach and small intestine
Transit
Defence against infection (acid)
Digestions and absorption
4 functions of the large intestine and anus
Transit
Reabsorption of H2O & electrolytes
Stool formation
Waste excretion
What is this component of the GI tract?
Oral cavity
What is this component of the GI tract?
Pharynx
What is this component of the GI tract?
Oesophagus
What is this component of the GI tract?
Stomach
What is this component of the GI tract?
Large intestine
What is this component of the GI tract?
Anus
What is this component of the GI tract?
Rectum
What is this component of the GI tract?
Small intestine
What is this structure in the oral cavity?
Nasal cavity
What is this structure in the oral cavity?
Soft palate
What is this structure in the oral cavity?
Tongue
What is this structure in the oral cavity?
Hyoid bone
What is this structure in the oral cavity?
Muscle of the floor of the mouth
What is this structure in the oral cavity?
Mandible
What is this structure in the oral cavity?
Teeth (dentition)
What is this structure in the oral cavity?
Oral cavity
What is this structure in the oral cavity?
Hard palate
What is this structure in the surface anatomy of the oral cavity?
Upper dental arch
What is this structure in the surface anatomy of the oral cavity?
Palatine tonsil
What is this structure in the surface anatomy of the oral cavity?
Gingiva
What is this structure in the surface anatomy of the oral cavity?
Lower dental arch
What is this structure in the surface anatomy of the oral cavity?
Uvula
What is this structure in the surface anatomy of the oral cavity?
Tongue
What is this structure in the surface anatomy of the oral cavity?
Arches of the soft palate
What are the names of the two arches of soft palate and where r they located in relation to one another?
Palatoglossal arch: anterior
Palatopharyngeal arch: posterior
What is this structure in the surface anatomy of the oral cavity?
Soft palate
What is this structure in the surface anatomy of the oral cavity?
Hard palate
What does mastication mean?
Chewing
What 2 things does mastication do?
Movement of tongue and jaw breaks down food
Facilitates taste and digestion by mixing food with saliva
What is this structure in the coronal view of half the oral cavity?
Maxilla
What is this structure in the coronal view of half the oral cavity?
Tongue
What is this structure in the coronal view of half the oral cavity?
Mandible
What is this structure in the coronal view of half the oral cavity?
Lower dentition
What is this piece of food called in this coronal view of the oral cavity?
Food bolus
What is this structure in the coronal view of half the oral cavity?
Buccinator
What is this structure in the coronal view of half the oral cavity?
Upper dentition
What is the joint called which the muscles of mastication act on to elevate and depress the mandible?
Temporomandibular joint
Name the 4 muscles of mastication, which ones elevate the mandible?
Temporalis: elevate
Lateral Pterygoid: depress
Medial pterygoid: elevate
Masseter: elevate
Name this structure?
Temporomandibular joint
Name this structure?
Lateral pterygoid
Name this structure?
Medial pterygoid
Name this structure?
Masseter
Name this structure?
Temporalis
Name this structure?
Temporalis
How many teeth in adult dentition and deciduous teeth?
32 adult
20 child