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  2. Notochord - Wikipedia

    en.wikipedia.org/wiki/Notochord

    Red: notochord; Magenta: axochord; Green: nerve chord; Blue: epidermis; Yellow: mesoderm. The notochord is an elastic, rod-like structure found in chordates. In chordate vertebrates the notochord is an embryonic structure that disintegrates, as the vertebrae develop, to become the nucleus pulposus in the intervertebral discs of the vertebral ...

  3. Schmorl's nodes - Wikipedia

    en.wikipedia.org/wiki/Schmorl's_nodes

    Schmorl's nodes are fairly common, especially with minor degeneration of the aging spine, but they are also seen in younger spines. Schmorl's nodes often cause no symptoms, but may simply reflect that "wear and tear" of the spine has occurred over time; they may also reflect that bone strength was at one time somewhat compromised, perhaps due to a vitamin D deficiency although this has yet to ...

  4. Spinal column - Wikipedia

    en.wikipedia.org/wiki/Vertebral_articulation

    The spinal column, also known as the vertebral column, spine or backbone, is the core part of the axial skeleton in vertebrate animals.The vertebral column is the defining and eponymous characteristic of the vertebrate endoskeleton, where the notochord (an elastic collagen-wrapped glycoprotein rod) found in all chordates has been replaced by a segmented series of mineralized irregular bones ...

  5. Intervertebral disc - Wikipedia

    en.wikipedia.org/wiki/Intervertebral_disc

    The nucleus pulposus contains loose fibers suspended in a mucoprotein gel. The nucleus of the disc acts as a shock absorber, absorbing the impact of the body's activities and keeping the two vertebrae separated. It is the remnant of the notochord. [2] There is one disc between each pair of vertebrae, except for the first cervical segment, the ...

  6. Tunicate - Wikipedia

    en.wikipedia.org/wiki/Tunicate

    A tunicate is an exclusively marine invertebrate animal, a member of the subphylum Tunicata (/ ˌ tj uː n ɪ ˈ k eɪ t ə / TEW-nih-KAY-tə).This grouping is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords (including vertebrates).

  7. Vertebra - Wikipedia

    en.wikipedia.org/wiki/Vertebra

    Each vertebra (pl.: vertebrae) is an irregular bone with a complex structure composed of bone and some hyaline cartilage, that make up the vertebral column or spine, of vertebrates. The proportions of the vertebrae differ according to their spinal segment and the particular species.

  8. 14 Things That Might Be Causing Pain in Your Lower Left Abdomen

    www.aol.com/14-things-might-causing-pain...

    Epididymitis is inflammation of the epididymis, a tube at the back of the testicle that stores sperm, explains Dr. Boxer. “It can cause pain and swelling in the testicle, along with fever or ...

  9. Spinal disease - Wikipedia

    en.wikipedia.org/wiki/Spinal_disease

    Because each vertebra can cause pain in different areas of the body, the pain from the disease can be sensed in the back, leg, neck area, or even the arms. When the spinal canal begins to lose its gap and gets thinner, it can cause pain in the neck, which can also cause a numb feeling in the arms and hands.

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