muscularis
Organ wall muscle
Muscularis refers to the muscular layer of an organ wall, particularly in the digestive tract.
The full term *tunica muscularis* or *muscularis propria* describes the smooth muscle responsible for peristalsis—the contractions that move food through the gut.
In anatomy, muscularis distinguishes the muscle coat from other tissue layers like the mucosa or serosa.
Involuntary digestive muscle waves
- contractionReduction in size
- relaxationState of being unwound
- propulsionForce driving movement forward
- segmentationDivision into sections
churning · movement · coordination · plexus · autonomic · innervation · motility · actin
Single thickness of material
- wallVertical enclosing structure
- smoothWithout roughness or difficulty
- circularForming a closed curve
- longitudinalAlong the longer dimension
esophagus · stomach · intestine · colon · bladder · ureter · gastrointestinal · mucosa
Tissue enlargement via cells
- atrophyWasting from disuse
- fibrosisPathological connective tissue buildup
- inflammationProtective tissue response
- dysfunctionAbnormal or unhealthy operation
spasm · gastroparesis · achalasia · stricture · obstruction · dilation · thickening · lesion
peristalsis
Involuntary digestive muscle waves
- contractionReduction in size
- relaxationState of being unwound
- propulsionForce driving movement forward
segmentation · churning · movement · coordination · plexus · autonomic · innervation · motility · actin · myosin
layer
Single thickness of material
longitudinal · esophagus · stomach · intestine · colon · bladder · ureter · gastrointestinal · mucosa · submucosa
hypertrophy
Tissue enlargement via cells
- atrophyWasting from disuse
- fibrosisPathological connective tissue buildup
- inflammationProtective tissue response
dysfunction · spasm · gastroparesis · achalasia · stricture · obstruction · dilation · thickening · lesion · disease
smooth
Without roughness or difficulty
collagen · elastin · connective · tissue · staining · microscopy · biopsy · section · inner · outer
muscularismucosa
Moist organ lining
serosa · submucosa · epithelium · intima · endothelium
- muscular dystrophyGenetic muscle-wasting condition
- muscular buildWell-developed physical form
- muscular systemBody's movement apparatus
- muscular bodyPhysique with developed sinews
- muscular enduranceSustained contraction capability
- muscular dystrophiesHereditary muscle-wasting conditions