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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2019/05/24 21:40:49」(JST)

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The tunica externa (New Latin "outer coat") — also known as the tunica adventitia (New Latin "additional coat"), or adventitia for short — is the outermost tunica (layer) of a blood vessel, surrounding the tunica media. It is mainly composed of collagen and, in arteries, is supported by external elastic lamina. The collagen serves to anchor the blood vessel to nearby organs, giving it stability.

The tunicae of blood vessels are three layers: an inner, middle, and outer layer that are called, respectively, the tunica intima, the tunica media, and the tunica externa (or tunica adventitia).

Clinical significance

A common pathological disorder concerning the tunica externa is scurvy, also known as vitamin C deficiency. Scurvy occurs because vitamin C is essential for the synthesis of collagen, and without it, the faulty collagen cannot maintain the vein walls and rupture, leading to a multitude of problems.

Additional images

Transverse section through a small artery and vein of the mucous membrane of the epiglottis of a child. (Tunica adventitia is at 'a')
Microphotography of arterial wall with calcified (violet colour) atherosclerotic plaque (haematoxylin & eosin stain)

References

This article incorporates text in the public domain from page 499 of the 20th edition of Gray's Anatomy (1918)

External links

Anatomy photo: Circulatory/vessels/vessels7/vessels4 - Comparative Organology at University of California, Davis - "Bird, vessels (LM, High)"
Image at About.com

UpToDate Contents

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1. ペイロニー病の外科的マネージメントsurgical management of peyronies disease [show details]
…techniques are: Nesbit procedure – One or more ellipses of the tunica albuginea are excised from the convex side (ie, tunica wedge resection) and the tunica plicated at the most prominent portion of the curvature …
2. 小児における耳漏（耳だれ）の評価evaluation of otorrhea ear discharge in children [show details]
…outer ear signals external canal inflammation (eg, otitis externa, foreign body). Pruritus – Itching is a prominent feature of otitis externa (including otomycosis), allergic dermatitis, and ear foreign …
3. 小児における耳痛の評価evaluation of earache in children [show details]
…Otitis externa refers to diffuse infection of the external ear canal, typically caused by Pseudomonas aeruginosa, Staphylococcus aureus, or occasionally other gram-negative rods. Otitis externa usually …
4. 眼、耳、尿路、胃腸管、および中枢神経系における緑膿菌感染症pseudomonas aeruginosa infections of the eye ear urinary tract gastrointestinal tract and central nervous system [show details]
…In contrast to acute otitis externa, chronic otitis externa is generally caused by allergies or underlying inflammatory dermatologic conditions . Patients with otitis externa typically complain of itching …
5. 成人の急性中耳炎acute otitis media in adults [show details]
…(AOM) includes otitis media with effusion (OME), chronic otitis media (COM), external otitis (otitis externa), herpes zoster infection, and other deep space head and neck infections. An entity that is commonly…

English Journal

Crataegus Aronia protects and reverses vascular inflammation in a high fat diet rat model by an antioxidant mechanism and modulating serum levels of oxidized low-density lipoprotein.

Shatoor AS, Al Humayed S, Alkhateeb MA, Shatoor KA, Aldera H, Alassiri M, Shati AA.
Pharmaceutical biology. 2019 Dec;57(1)38-48.
Crataegus aronia (Willd.) Bosc (Rosaceae) (syn. Azarolus L) is traditionally used to treat cardiovascular disorders. To investigate C. aronia protection against a high-fat diet (HFD)-induced vascular inflammation in rats. Wistar Male rats (180-220 g) were divided (n = 10/group) as control fed
PMID 30702358

The pCONUS HPC: 30-Day and 180-Day In Vivo Biocompatibility Results.

Bhogal P, Lenz-Habijan T, Bannewitz C, Hannes R, Monstadt H, Simgen A, Mühl-Benninghaus R, Reith W, Henkes H.
Cardiovascular and interventional radiology. 2019 Jul;42(7)1008-1015.
Endovascular stents are commonly used during neurointerventional procedures; however, the concomitant use of dual anti-platelet treatment (DAPT) can limit their use. There is a need to develop stent coatings that mitigate requirement for DAPT. The hydrophilic polymer coating is a novel glycan-based
PMID 30868277

Robust segmentation of arterial walls in intravascular ultrasound images using Dual Path U-Net.

Yang J, Faraji M, Basu A.
Ultrasonics. 2019 Jul;96()24-33.
A Fully Convolutional Network (FCN) based deep architecture called Dual Path U-Net (DPU-Net) is proposed for automatic segmentation of the lumen and media-adventitia in IntraVascular UltraSound (IVUS) frames, which is crucial for diagnosis of many cardiovascular diseases and also for facilitating 3D
PMID 30947071

Japanese Journal

<b>Fine structure of human thoracic duct as revealed by light and scanning electron micr</b><b>oscopy </b>

CHIBA Tomohiro,NARITA Hirokazu,SHIMODA Hiroshi
Biomedical Research 38(3), 197-205, 2017
… The longitudinal muscle sheet in the tunica intima and circular muscle bundles in the tunica media constructed an integrated power unit probably eliciting spontaneous lymph propulsion. … Furthermore, the thoracic duct was richly supplied with blood vessels not only in the tunica externa, but also just beneath the endothelium. …
NAID 130006865613

下肢静脈瘤の血管内レーザー焼灼術に対する波長980 nm および1470 nm レーザーを用いた非臨床実験による至適照射条件の検討

野添紗希,本多典広,石井克典,粟津邦男
日本レーザー医学会誌 34(4), 372-381, 2014
下肢静脈瘤に対する血管内レーザー焼灼術が2011年に保険適用された．その治療件数が急増したが，術後の疼痛や皮下出血が問題であり，より安全かつ有効な照射方式を定量的に求める必要がある．本研究の目的は非臨床実験により至適照射条件を検討することである．独自に構築した非臨床実験照射系を用い，波長，照射パワー，照射時間やファイバーの形状の違いによる照射効果を網羅的に検討し，算出した静脈組織の光学特性値，組織 …
NAID 130005065157

同一領域に類基底細胞癌と腺扁平上皮癌を認めた食道癌の1例

南部弘太郎,田中洋一,坂本裕彦,川島吉之,網倉克己,西村洋治,黒住昌史,渋谷哲男,徳永昭
日本消化器外科学会雑誌 41(11), 1904-1909, 2008-11-01
我々は同一領域に類基底細胞癌と腺扁平上皮癌の病巣を認めた極めてまれな食道癌の1例を経験したので報告する.症例は71歳の男性で,3か月前から嚥下困難が生じ,近医を受診,食道癌の診断で当院紹介となる.内視鏡検査では門歯から34cmの部位に全周性の3型病変を認めた.生検で扁平上皮癌と診断し,胸腹部食道全摘術を行った.切除標本の病理組織学的検査所見では,広範囲の上皮内伸展を認め,上皮内癌巣の直下に類基底細 …
NAID 110006980570

「外膜」

Tunica externa (vessels)
	Section of a medium-sized artery.
Details
Part of	Wall of blood vessels
Identifiers
Latin	Tunica externa vasorum,; tunica adventitia vasorum
MeSH	D063194
TA	A12.0.00.017
TH	H3.09.02.0.01009
FMA	45635
	Anatomical terminology [edit on Wikidata]

　　[★]

英: tunica adventitia (Z), outer membrane, adventitia
ラ: tunica externa, tunica adventitia
関: 漿膜、血管、内膜、中膜。細胞壁

結合組織のみ
線維芽細胞、膠原線維、縦走する弾性線維 (HIS. 216)
周囲の結合組織に移行 (HIS. 216)

(血管)血管の最外層
(食道)食道の最外層

匿名

検索

案内

案内

tunica externa