GI SYSTEM 1.2 Flashcards
MUSCULARIS EXTERNIS what is mucuslaris externis made of
smooth muscle
MUSCULARIS EXTERNIS what is the function of muscularis externis
motility
MUSCULARIS EXTERNIS how many layers of smooth muscle
2
- inner circular
- outer longitudinal
MUSCULARIS EXTERNIS what is muscularis layer at beginning and end
somatic skeletal muscle
MUSCULARIS EXTERNIS what controls smooth muscle
ANS
MUSCULARIS EXTERNIS what plexus is located in muscularis externis layer
myenteric plexus
MUSCULARIS EXTERNIS what is the function of myenteric plexus
control smooth muscle
SEROSA what is serosa
serous mem
SEROSA what is serous mem
simple squamous epithelium with CT
SEROSA how many laters of serous mem
2
SEROSA what is mesentery
2 layers of serous mem sandwiching vasculature
GI ORGANS what are 4 accessory organs
- liver
- gallbladder
- pancreas
- salivary glands
GI ORGANS what are 3 upper GI organs
- oral cavity
- pharynx
- esophagus
GI ORGANS where is oral cavity located
under nasal cavity
GI ORGANS where is pharynx located
- behind nasal cavity
- behind oral cavity
GI ORGANS what occurs at esophagus
transition from skeletal to smooth muscle
GI ORGANS where is peritoneal cavity
under diaphragm
GI ORGANS where does duodenum receive its secretions
- liver
2. pancreas
QUADRANTS how to obtain abdominal quadrants
draw 2 lines from belly button
- one horizontal
- one vertical
QUADRANTS what are 4 quadrants
- upper R
- upper L
- lower R
- lower L
GI ORGANS what is located in upper R (5)
- liver
- gallbladder
- duodenum
- R kidney
- head of pancreas
GI ORGANS what is located in upper L (4)
- stomach
- spleen
- L kidney
- body and tail of pancreas
GI ORGANS what is located in lower R (4)
- appendix
- ascending colon
- cecum
- ileum
GI ORGANS what is located in lower L (3)
- descending colon
- sigmoid colon
- ileum
ABDOMINAL REGIONS how to obtain mid clavicular planes
draw 2 vertical lines going down middle of clavicles
ABDOMINAL REGIONS how to obtain subcostal plane
draw horizontal line underneath ribs
ABDOMINAL REGIONShow to obtain intertubercular plane
draw horizontal line at iliac crests or L5
ABDOMINAL REGIONS what are 3 regions
- epigastric
- umbilical
- pubic
PERITONEUM what kind of mem is peritoneum
serous mem
PERITONEUM what does parietal peritoneum line
abdominal body wall
PERITONEUM what does visceral peritoneum line
organs of tube except pancreas
PERITONEUM what is the function of parietal peritoneum
separate peritoneal cavity from pelvic cavity
PERITONEUM what makes up mesentery
2 layers of visceral peritoneum sandwiching vasculature
PERITONEUM what is lesser omentum
mesentery going from lesser curvature of stomach to liver
PERITONEUM what is greater omentum
mesentery going from greater curvature of stomach to transverse colon
PERITONEUM what makes a structure retroperitoneal (3)
- attached to body wall
- not surrounded by visceral peritoneum
- behind visceral peritoneum
PERITONEUM what 4 structures are retroperitoneal
- duodenum
- ascending colon
- descending colon
- everything in pelvis
VASCULATURE where does vasculature come from
abdominal aorta
VASCULATURE what are 3 major branches of abdominal aorta
- celiac trunk
- superior mesenteric artery
- inferiro mesenteric artery
what does celiac trunk supply
abdominal esophagus to duodenum
VASCULATURE what region is associated w foregut
epigastric
VASCULATURE what does SMA supply
descending part of duodenum to left colic flexure
VASCULATURE what is associated w midgut
umbilical
VASCULATURE what does IMA supply
left colic flexure to rectum
VASCULATURE what is associated w hindgut
pubic
VENOUS VASCULATURE what are 3 veins
- splenic
- superior mesenteric vein
- inferior mesenteric vein
VENOUS VASCULATURE what do 3 veins lead to
portal vein
VENOUS VASCULATURE where does portal vein go
liver
VENOUS VASCULATURE what kind of blood goes to liver
- deoxygenated
2. nutrient rich
ORAL CAVITY what is mucosa layer in oral cavity called
oral mucosa
ORAL CAVITY how is oral mucosa specialized
stratified squamous epithelium instead of simple squamous epithelium
ORAL CAVITY what happens in oral cavity (4)
- sensory analysis of ingested food
- mechanical digestion
- chemical digestion
- lubricate ingested food w saliva
ORAL CAVITY where is amylase found
saliva
ORAL CAVITY what is amylase involved in
chemical digestion of carbs
TEETH what are 3 parts of teeth
- crown
- neck
- root
TEETH where is neck located
in gums
TEETH where is root located
areolar bone
TEETH what is periodontal ligament / gomphosis
fibrous connection bw root and areolar bone
TEETH what is the function of line of cement
resist pressure
TEETH what goes through root canal
neuro vascular bundle
TEETH where does neuro vasculature bundle end
pulp cavity
TEETH what is the function of neurovascular bundle
provide nutrients to root
TEETH where does growth occur
dentin
TEETH what is dentin unable to do
remodel
TEETH why is dentin unable to remodel
lacks vasculature
DENTITION what are teeth involved in
mechanical digestion
DENTITION what is the function of incisors
cut
DENTITION what is the function of canines
tear
DENTITION what is the function of premolars
crush
DENTITION what is the function of molars
grind
DENTITION how many incisors
2
DENTITION how many canines
1
DENTITION how many premolars
2
DENTITION how many molars
3
DENTITION what are baby teeth lacking
premolars
TONGUE what innervates tongue
CN12
TONGUE what are intrinsic muscles
muscles within tongue
TONGUE what is the function of intrinsic muscles
contract to change shape of mouth for speaking
TONGUE what are 4 extrinsic muscles
- palatoglossus
- styloglossus
- hyoglossus
- genioglossus
TONGUE what is palatoglossus
palate to tongue
TONGUE why is styloglossus
styloid to tongue
TONGUE what is hyoglossus
hyoid to tongue
TONGUE what is genioglossus
chin to tongue
TONGUE what is function of extrinsic muscles
move tongue during swallowing
TONGUE what is the function of terminal sulcus
separate anterior 2/3 from posterior 1/3
TONGUE what is anterior 2/3
body
TONGUE what is posterior 1/3
root
TONGUE what innervates body
mandibular
CN V3
TONGUE what innervates root
glossopharyngeal
CN IX
what innervates tongue for taste sensation
- facial nerve CN VII
2. glossopharyngeal CN IX
SALIVARY GLANDS what are 2 secretions
- serous
2. mucous
SALIVARY GLANDS what is serous secretion for
digestion
SALIVARY GLANDS what is mucous secretion for
lubrication
SALIVARY GLANDS what are 3 major salivary glands
- parotid
- sublingual
- submandibular
SALIVARY GLANDS what does parotid gland secrete
serous
SALIVARY GLANDS where does duct empty (parotid)
oral vestibule
SALIVARY GLANDS what innervates parotid gland
glossopharyngeal CN IX
SALIVARY GLANDS what does sublingual gland secrete
mucous
SALIVARY GLANDS where does duct empty (sublingual)
underneath tongue
SALIVARY GLANDS what innervates sublingual gland
facial nerve CN VII
SALIVARY GLANDS what does submandibular gland secrete
- serous
2. mucous
SALIVARY GLANDS where does duct empty (submandibular)
sublingual caruncle
SALIVARY GLANDS what innervates submandibular gland
facial nerve CN VII
SALIVARY GLANDS what stimulates secretion
parasympathetic
SALIVARY GLANDS what inhibits secretion
sympathetic
PHARYNX what kind of epithelium does pharynx have in mucosal layer
stratifies squamous epithelium
PHARYNX what are palatal muscles
tensor veli palatini
tensor levator palatini
PHARYNX what is the function of palatal muscles
elevate soft palate
PHARYNX what are pharyngeal constrictors
- superior
- middle
- inferior
PHARYNX what is the function of pharyngeal constrictors
- elevate larynx
2. push bolus to esophagus
what is bolus
food mixed with saliva
PHARYNX what are steps of swallowing
- contract tongue to push bolus to oropharynx + close nasopharynx
- contract myohyloid to push bolus to oropharynx+ close nasopharynx
- contract palatal muscles to push bolus to oropharynx + close nasopharynx
- elevate pharynx
- elevate trachea
- contract pharyngeal constrictors
PERISTALSIS what is peristalsis
movement of food through tube
PERISTALSIS what is the function of circular smooth muscle
contracts to make sure bolus goes in one direction
PERISTALSIS what is the function of longitudinal muscles
contract to make sure food propelled further
PERISTALSIS what is segmentation
contraction of circular and longitudinal muscles at the same time
PERISTALSIS what happens during segmentation
- there is no forward movement
- there is break down of bolus
- there is compactionof bolus
PERISTALSIS where does compaction occur
- stomach for break down
- colon forcompaction
ESOPHAGUS what does mucosal layer contain
simple squamous epithelium
ESOPHAGUS what does submucosa layer contain
extra glands
ESOPHAGUS what kind of muscle does esophagus contain in muscularis externis layer
- skeletal
2. smooth
ESOPHAGUS what are mechanisms for acid reflux
- cardiac sphincter
- peristaltic clearance
- extra submucosal glands to protect mucosal layer
- mucous produced by stomach