Final answer:
An intervertebral disc is composed of fibrocartilaginous tissue with an outer layer anulus fibrosus and inner gel-like nucleus pulposus, providing cushioning between adjacent vertebrae.
Step-by-step explanation:
An intervertebral disc is composed of fibrocartilaginous tissue and is located between adjacent vertebrae. It consists of a tough, fibrous outer layer called the anulus fibrosus and a gel-like center known as the nucleus pulposus.
The intervertebral discs play a critical role in the structure and function of the spinal column. They provide cushioning and shock absorption during various activities such as walking and running. As a person ages, the water content in the nucleus pulposus decreases, which leads to reduced disc flexibility and shock absorption capability. These changes contribute to the overall height decrease and potential spinal issues with age.