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Arcuate line of ilium
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<p>The arcuate line of the <a href="/facts/Ilium_(bone)/4zEB7NX0">ilium</a> is a smooth rounded border on the internal surface of the ilium. It is immediately inferior to the <a href="/facts/Iliac_fossa/NU8rzEeS">iliac fossa</a> and <a href="/facts/Iliacus/2NVYNqL2">Iliacus</a> muscle. </p><p>It forms part of the border of the <a href="/facts/Pelvic_inlet/KAjsY6vc">pelvic inlet</a>. </p><p>In combination with the <a href="/facts/Pectineal_line_(pubis)/5UpCmtGw">pectineal line</a>, it comprises the <a href="/facts/Iliopectineal_line/ln5vzRMP">iliopectineal line</a>. </p><p>The arcuate line marks the border between the body (<i>corpus</i>) and the <a href="/facts/Wing_of_ilium/MdfJeXsc">wing</a> (<i>ala</i>) of the ilium, and, running inferior, anterior, and medial from the auricular surface to the area corresponding to the <a href="/facts/Acetabulum/Qmro7ff7">acetabulum</a>, it also indicates where weight is transferred from the <a href="/facts/Sacroiliac_joint/XgpSo3YP">sacroiliac joint</a> to the <a href="/facts/Hip_joint/UvnUYIfS">hip joint</a>. </p>