WordNet

of or relating to or consisting of muscle; "muscular contraction"
having or suggesting great physical power or force; "the muscular and passionate Fifth Symphony"

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『助肉の』,筋肉でできた / 筋肉による / 筋肉の発達した

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/06/26 06:31:18」(JST)

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The muscular layer (muscular coat, muscular fibers, muscularis propria, muscularis externa) is a region of muscle in many organs in the vertebrate body, adjacent to the submucosa. It is responsible for gut movement such as peristalsis. The Latin, tunica muscularis, may also be used.

Structure

It usually has two layers of smooth muscle:

inner and "circular"
outer and "longitudinal"

However, there are some exceptions to this pattern.

In the stomach and large intestine, there are three layers to the muscularis externa.
In the upper esophagus, part of the externa is skeletal muscle, rather than smooth muscle.
In the vas deferens of the spermatic cord, there are three layers: inner longitudinal, middle circular, and outer longitudinal.
In the ureter the smooth muscle orientation is opposite that of the GI tract. There is an inner longitudinal and an outer circular layer.

The inner layer of the muscularis externa forms a sphincter at two locations of the alimentary canal:

in the pylorus of the stomach, it forms the pyloric sphincter
in the anal canal, it forms the internal anal sphincter

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

Bioweb at UWLAX Muscularis externa of the colon
Bioweb at UWLAX Smooth muscle layers of the gut
UIUC Histology Subject 23
Histology image: 11601ooa – Histology Learning System at Boston University — "Muscle Tissue: smooth muscle, muscularis externa"

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「MP」

Muscular layer
	Histological section of the ureter, showing the thick muscular layers surrounding the lumen.
Details
Latin	tunica muscularis
Identifiers
Dorlands; /Elsevier	12832129
	Anatomical terminology

　　[★]

「固有筋層」

　　[★]

英: muscularis propria, mp
関: 消化器系#上皮の移行

「mp」

　　[★] 固有筋層 muscularis propria

「muscular」

　　[★]

adj.

筋肉の、筋の

関: muscle、muscularis、musculus、myo

「muscularis」

　　[★]

n.

筋

関: muscle、muscular、musculus、myo

リンク元	「MP」「固有筋層」「mp」
関連記事	「muscular」「muscularis」

匿名

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案内

案内

muscularis propria