Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.


 [too´nĭ-kah] (L.)
a tunic or coat; used in anatomic nomenclature to designate a membranous covering of an organ or a distinct layer of the wall of a hollow structure, as a blood vessel.
tunica adventi´tia the outer coat of various tubular structures.
tunica albugi´nea a dense white fibrous sheath that encloses a part or organ, such as the testicle or ovary.
tunica conjuncti´va the conjunctiva.
tunica dar´tos dartos.
tunica exter´na an outer coat, such as the fibroelastic coat of a blood vessel.
tunica inter´na an inner coat or layer.
tunica in´tima the innermost coat of a blood vessel; called also Bichat's tunic.
tunica me´dia the muscular middle coat of a blood vessel.
tunica muco´sa the mucous membrane lining of various tubular structures.
tunica muscula´ris the muscular coat or layer surrounding the tela submucosa in most portions of the digestive, respiratory, urinary, and genital tracts.
tunica pro´pria the proper coat or layer of a part, as distinguished from an investing membrane.
tunica sero´sa the membrane lining the external walls of the body cavities and reflected over the surfaces of protruding organs; it secretes a watery exudate.
tunica vagina´lis tes´tis the serous membrane covering the front and sides of the testis and epididymis.
tunica vasculo´sa a vascular coat, or a layer well supplied with blood vessels.

dar·tos fas·ci·a

a superficial fascial layer incorporating smooth muscular tissue in the integument of the scrotum; it also forms the scrotal septum.
See also: dartos muliebris, dartos muscle.


/dar·tos/ (dahr´tos)
1. dartos muscle.


the contractile tissue under the skin of the scrotum; called also tunica dartos.
References in periodicals archive ?
The concept of dartos fascial flap initially was described 25 years ago.
Snodgrass hypospadias repair with Vascularized dartos flap the perfect repair for virgin cases of hypospadias.
In 2003, Sozbir and Snodgrass mentioned that dartos flap obtained from the dorsal prepuse 11 and shaft skin is used to cover the neourethra .
Minor travmalann etiyolojide rol alabilecegini Feinstein ve arkadaslari (9) ifade etmis ve travmaya sekonder dartos kasinin distrofik kalsifikasyonun hastaliga yol actigini bildirmislerdir.
Second, the tunica dartos muscle relaxes during high ambient temperatures, moving the testes away from the warm body cavity.
Congenital Penile Pathology is associated with abnormal development of the dartos muscle: A prospective study in a large cohort of children undergoing primary penile surgery at a tertiary referral center.
Uma incisao com aproximadamente 5cm de comprimento foi feita na regiao lateral de cada testiculo, seccionando-se a pele e tunica dartos e a tunica vaginal ate exposicao do testiculo e da tunica albulginea.
1-5) La continuidad de las fascias subcutaneas de Buck (pene), dartos (escroto), Colles (perine) y Scarpa (pared abdominal) favorecen la diseminacion del proceso infeccioso por estas regiones anatomicas.
Deri leyomiyomalari genellikle dort gruba ayrilir: 1) piloleyomiyomalar; soliter veya multipl, errektor pilorum kasindan koken alirlar 2) anjiyoleyomiyomalar; vaskuler duz kastan koken alirlar 3) dartoik leyomiyomalar; genital bolge, areola ve meme basinda bulunan dartos kasindan koken alirlar 4) lipoleyomiyomalar; ilave olarak mezenkimal elemanlar icerirler (2).
Scrotum The sac that houses the testis that is composed of skin and an underlying layer of smooth muscle called the tunica dartos.
1 The septum is contiguous with the dartos muscle underneath the scrotal skin.