The sacral lymph nodes are placed in the concavity of the

sacrum The sacrum (plural: ''sacra'' or ''sacrums''), in human anatomy, is a large, triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1S5) between ages 18 and 30. The sacrum situates at the upper, back part o ...

, in relation to the middle and

lateral sacral arteries The lateral sacral arteries is an artery in the pelvis that arises from the posterior division of the internal iliac artery. It later splits into two smaller branches, a superior and an inferior. Structure The lateral sacral artery is the seco ...

; they receive lymphatics from the rectum and posterior wall of the

pelvis The pelvis (plural pelves or pelvises) is the lower part of the trunk, between the abdomen and the thighs (sometimes also called pelvic region), together with its embedded skeleton (sometimes also called bony pelvis, or pelvic skeleton). The ...

References

External links

* http://anatomy.uams.edu/AnatomyHTML/lymph_pelvis&perineum.html Lymphatics of the torso {{Portal bar, Anatomy