Histo Of Stomach Flashcards
GI tract wall has 4 layers:
______
_______
__________
_______
Mucosa
Submucosa
Muscularis Externa
Serosa or Adventitia
STOMACH
Epithelium: ______ epithelium
Muscularis ____ has an additional _____ layer of muscle
Simple columnar
oblique
externa
Mucosa
(Thin or Thick?)
(smooth or rough?) surface
_______
_______ to ____ in colour
Thick
Smooth
velvety
Reddish brown
pink
STOMACH
In contracted state mucosa is folded to form _____.
RUGAE
Gastric rugae are _____ & more marked towards _____ and ____
Longitudinal
pyloric & greater curvature
Actually rugae are (small or large?) folds in ______ connective tissue
Large
sub mucosal
Rugae is Obliterated when stomach is _____
distended
Stomach Epithelium
Appears as _____ due to (small or large?) gastric ____ .
honey combed
Small
pits
Gastric pits
Aka
foveola
Base of gastric pits receives ———- which extend deep into ________
gastric glands
lamina propria
Types of gastric glands
_____
____
_____
Cardiac
Principal
Pyloric
Principal gastric glands
Found In _____ and _____
Cardiac gastric glands
Situated near the _____
Pyloric glands
numerous _______ and _____ cells predominate
body & fundus
cardia
mucous & entero endocrine
Principal gastric glands
Are Highly differentiated
T/F
T
Principal gastric glands
Found In _____ and ____
Are made of different types of cells
\_\_\_\_\_
\_\_\_\_
\_\_\_\_\_
\_\_\_\_\_
\_\_\_\_\_\_
body & fundus
Chief
Parietal
Mucous
Stem
Entero endocrine
Cardiac glands
Situated near the _____
_______ cells predominate
Pyloric glands
numerous _______ and ———- cells predominate
cardia
Mucous secreting
mucous & entero endocrine
Mucous neck cells: found in the ____ portion
Parietal cells: found in ____ portion secrete ____ and _____
duct
mid
HCl & intrinsic factor for B12 absorption
CHIEF CELLS:
Found at ____ of gland
secretes _______
base
pepsinogen
pepsinogen is a precursor molecule to _____ (an enzyme that digests ____
pepsin
protein
MUCOSAL BARRIER: protects the stomach from its own secretions
__________ overlies a thick coating of _______
_________ between epithelial cells are impermeable to HCl
Epithelium is replaced every _______
Viscous mucous
HCO3- rich mucous
Tight junctions
3-6 days
Lamina Propria
Found in between the glands
Contain gastric ______ which are aggregations of lymphoid tissue
A __________ plexus is also present
follicles
periglandular vascular
Stomach Muscularis mucosa
______
________
______
Inner circular
Outer longitudinal
Ext circular in some places
Muscularis externa of stomach
______ fibres
_____ fibers
______ fibers
Oblique
Circular
Longitudinal
Stomach muscularis externa
Oblique fibres
Limited to _______
Most developed near the ______
Circular fibres
Form a uniform layer (internal or external?) to oblique fibres
At the pylorus forms __________
gastric body
cardiac orifice
External
annular pyloric sphincter
Longitudinal fibers of muscularis externa
Arranged in 2 groups
1st set radiates from ______, best developed along the ______
2nd set commence in the ____, passes to (left or right?) , some fibres pass to duodenum, deeper fibres interlace with ______
Muscle action: upper region of stomach forms an area of ______, lower region has a ____- like action mixing & delivering the contents to duodenum
cardiac orifice; curvatures
body
Right; pyloric sphincter
storage
pump
