Where is the sacrum?
The question "Where is the sacrum?"Ask people who are experiencing pain in the lower back and do not understand what they are connected with. Those who were interested in how many vertebrae a person has, know that the sacrum is one of the departments of the spine and, together with the coccyx, closes the pelvic ring behind.
Where is the sacrum in man
From the point of view of anatomy, the sacrum is located near thethe bases of the spine base upward. It is a large triangular bone, on which the main load is transferred from the spine to the pelvic bones with the vertical arrangement of the human body.
The vertebrae of the sacrum begin to form inembryonic period, passing through 3 stages: membranous, cartilaginous and bone. At a young age the sacrum consists of 5 separate vertebrae, which grow together from 13 to 30 years. In men, the number of vertebrae can be increased to 6.
The sacrum consists of several departments:
- the anterior surface of the concave shape, in the center there are transverse "sutures" in the joints of the vertebrae;
- back surface of convex shape and rough structure, on which there are 5 skulls;
- lateral surfaces in the form of a stake;
- the base of the sacrum is connected to the vertebra of the lumbar region.
In the central part of the sacrum, which has a curved shape, is the sacral canal, which is the continuation of the spinal canal. The nerves located in the canal exit through the sacral orifices.
Between the sacrum and the iliac bonessacroiliac joints. This part of the spine has a different anatomical structure in the male and female. In men, these joints are less mobile, and the sacrum almost completely adjoins the iliac bones. In women, the sacroiliac joints have the ability to expand during childbirth. Due to their plasticity of the femur, women wiggle while walking. The sacrum itself in women is longer, longer and has a more curved shape.