adventitia

American  

[ad-ven-tish-ee-uh, -tish-uh] / ˌæd vɛnˈtɪʃ i ə, -ˈtɪʃ ə /

noun

Anatomy.

1. the external covering of an organ or other structure, derived from connective tissue, especially the external covering of a blood vessel.

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adventitia British  

/ ˌædvɛnˈtɪʃɪə, -ˈtɪʃə /

noun

1. the outermost covering of an organ or part, esp the outer coat of a blood vessel

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Other Word Forms

• adventitial adjective

Etymology

Origin of adventitia

1875–80; < Latin adventīcia, neuter plural of adventīcius adventitious

Example Sentences

These mimic the layered structure of the native vascular wall, which, from inside out, is composed of the tunica intima, tunica media and tunica adventitia tissues.

From Science Daily

The adventitia or outer coat is exceedingly tough.

From Project Gutenberg

The outermost is the tunica adventitia, composed of connective tissue; immediately internal to this is the yellow elastic coat; within this again the muscular coat, formed of involuntary.

From Project Gutenberg

The external coat, tunica adventitia, is composed mainly of fine and closely woven bundles of white connective tissue, which chiefly run diagonally or obliquely around the vessel.

From Project Gutenberg

The adventitia of the large arteries is strong and firm, and is made up of interlacing fibroelastic tissue, of which some of the bundles are arranged longitudinally.

From Project Gutenberg