Anal triangle

<h2 id="structure">Structure</h2>
<p>The anal triangle can be defined either by its <a href="/facts/Vertex_(geometry)/ID3cea9z">vertices</a> or its sides.
</p>
<ul><li><i>Vertices</i>
<ul><li>one vertex at the <a href="/facts/Coccyx/BQ2qjXwg">coccyx</a> bone</li>
<li>the two <a href="/facts/Ischial_tuberosities/mbuJnvNt">ischial tuberosities</a> of the <a href="/facts/Pelvic_bone/2e4F8kot">pelvic bone</a></li></ul></li>
<li><i>Sides</i>
<ul><li><a href="/facts/Perineal_membrane/1DWbwrQA">perineal membrane</a> (posterior border of perineal membrane forms anterior border of anal triangle)</li>
<li>the two <a href="/facts/Sacrotuberous_ligaments/NXXyUhTv">sacrotuberous ligaments</a></li></ul></li></ul>
<h2 id="contents">Contents</h2>
<p>Some components of the anal triangle include:<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a> 
</p>
<ul><li><a href="/facts/Ischioanal_fossa/vHFblbem">Ischioanal fossa</a></li>
<li><a href="/facts/Anococcygeal_body/LGr2u1fr">Anococcygeal body</a></li>
<li><a href="/facts/Sacrotuberous_ligament/NXXyUhTv">Sacrotuberous ligament</a></li>
<li><a href="/facts/Sacrospinous_ligament/rBxHkXWN">Sacrospinous ligament</a></li>
<li><a href="/facts/Pudendal_nerve/aovMHeQD">Pudendal nerve</a></li>
<li><a href="/facts/Internal_pudendal_artery/82MmoqCg">Internal pudendal artery</a> and <a href="/facts/Internal_pudendal_vein/PLa7Ah1I">internal pudendal vein</a></li>
<li><a href="/facts/Anal_canal/rIh1hWx2">Anal canal</a></li>
<li>Muscles
<ul><li><a href="/facts/Sphincter_ani_externus_muscle/YIGwm0kz">Sphincter ani externus muscle</a></li>
<li><a href="/facts/Gluteus_maximus_muscle/uwzV7yN1">Gluteus maximus muscle</a></li>
<li><a href="/facts/Obturator_internus_muscle/YK4TGb3j">Obturator internus muscle</a></li>
<li><a href="/facts/Levator_ani_muscle/9DCEyeUt">Levator ani muscle</a></li>
<li><a href="/facts/Coccygeus_muscle/DjlQTlII">Coccygeus muscle</a></li></ul></li></ul>
<h2 id="additional-images">Additional images</h2>

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Perineum/MaBAap96">Perineum</a></li>
<li><a href="/facts/Urogenital_triangle/UQllGpog">Urogenital triangle</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="http://ect.downstate.edu/courseware/haonline/labs/l41/010202.htm">Anatomy photo:41:01-0202</a> at the SUNY Downstate Medical Center - "The Female Perineum: Boundaries of the Female Perineum"</li>
<li><a href="http://www.wesnorman.com/perineum.htm">perineum</a> at The Anatomy Lesson by Wesley Norman (Georgetown University) (<i><a href="http://www.wesnorman.com/Images/perineumboundaries.jpg">perineumboundaries</a></i>)</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>Daftary, Shirish; Chakravarti, Sudip (2011). Manual of Obstetrics, 3rd Edition. Elsevier. pp. 1-16. ISBN 9788131225561. <a href="/wiki/ISBN_(identifier)" target="_blank">/wiki/ISBN_(identifier)</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
</ol>

Anal triangle open-in-new

Anal triangle