The anal triangle is the posterior part of the perineum. It contains the anus in mammals.
Anal triangle | |
---|---|
![]() Muscles of male perineum. (Anal triangle is roughly equal to bottom half of diagram.) | |
![]() Muscles of the female perineum. (Anal triangle is roughly equal to bottom half of diagram.) | |
Details | |
Identifiers | |
Latin | regio analis |
TA98 | A01.2.06.002 |
TA2 | 278 |
FMA | 20347 |
Anatomical terminology |
Structure
editThe anal triangle can be defined either by its vertices or its sides.
- Vertices
- one vertex at the coccyx bone
- the two ischial tuberosities of the pelvic bone
- Sides
- perineal membrane (posterior border of perineal membrane forms anterior border of anal triangle)
- the two sacrotuberous ligaments
Contents
editSome components of the anal triangle include:[1]
Additional images
edit-
Articulations of pelvis. Posterior view.
-
The superficial branches of the internal pudendal artery.
See also
editReferences
edit- ^ Daftary, Shirish; Chakravarti, Sudip (2011). Manual of Obstetrics, 3rd Edition. Elsevier. pp. 1-16. ISBN 9788131225561.
External links
edit- Anatomy photo:41:01-0202 at the SUNY Downstate Medical Center - "The Female Perineum: Boundaries of the Female Perineum"
- perineum at The Anatomy Lesson by Wesley Norman (Georgetown University) (perineumboundaries)