According to the New York University Langone Medical Center, intervertebral discs are made up of "fibrocartilage tissue," which has two layers. While the inner portion resembles jelly, the outermost part has strong and f... More »

A slipped disc occurs when the soft inner portion of an intervertebral disc pushes against its own harder exterior portion, according to the American Academy of Orthopaedic Surgeons. In some cases, the soft middle comes ... More » Health Conditions & Diseases

Lumbar disc disease is a condition in which the intervertebral discs between vertebrae deteriorate and bulge out or rupture, according to Johns Hopkins Medicine. After rupture, fragments of disc material can press on ner... More » Health Conditions & Diseases

Pleural fluid prevents friction between the lungs and the chest cavity during respiration, and is found in a thin space between two layers of tissue. The tissues surrounding the lungs produce the fluid that rhythmically ... More »

A group of cells that carry out a certain job is called a tissue. Several tissues working together form an organ, and several organs together make up an organ system. More »

The photosynthetic tissue of a leaf is the palisade parenchyma, the upper layer of the middle layer of the leaf. It sits above the spongy parenchyma, the lower part of the mesophyll with far fewer chloroplasts. The mesop... More »

Some of the key functions of protein involve energy production, transportation, boosting the immune system and replenishing body tissue. Proteins are some of the most essential nutrients for human beings, and they can be... More »