Final answer:
The nucleus pulposus provides discs with compression resistance and weight-bearing capacity, but it becomes less effective as it loses water with age.
Step-by-step explanation:
The nucleus pulposus, the center of intervertebral discs, gives the discs the ability to resist compression and is important for weight bearing. This gel-like substance has a high water content, allowing the spine to absorb shocks from activities such as walking and running. However, as people age, the water content decreases, leading to reduced flexibility and diminished ability to absorb shock, which can have consequences for overall spinal health.
The nucleus pulposus, which is the gel-like center of the intervertebral discs, provides two important functions. Firstly, it absorbs shocks and helps with weight-bearing, acting as a cushion between adjacent vertebrae. Secondly, it allows the disc to change shape and provides flexibility for movement in the spine.
For example, when bending forward, the anterior portion of the disc gets compressed while the posterior disc expands. This movement is possible because of the gel-like nature of the nucleus pulposus. However, if the outer layer of the disc, the anulus fibrosus, weakens, the nucleus pulposus can protrude, causing a herniated disc.