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  2. Lumbar vertebrae - Wikipedia

    en.wikipedia.org/wiki/Lumbar_vertebrae

    It consists of 5 bones, from the top down, L1, L2, L3, L4 and L5. The lumbar vertebrae are located between the thoracic vertebrae and pelvis. They form the lower part of the human back in humans, and the tail end of the back in quadrupeds. In humans, there are five lumbar vertebrae. The term is used to describe the anatomy of humans and ...

  3. Spinal cord - Wikipedia

    en.wikipedia.org/wiki/Spinal_cord

    The spinal cord is a long, thin, tubular structure made up of nervous tissue that extends from the medulla oblongata in the lower brainstem to the lumbar region of the vertebral column (backbone) of vertebrate animals. The center of the spinal cord is hollow and contains a structure called the central canal, which contains cerebrospinal fluid.

  4. Dimples of Venus - Wikipedia

    en.wikipedia.org/wiki/Dimples_of_Venus

    The term "dimples of Venus", while informal, is a historically accepted name within the medical profession for the superficial topography of the sacroiliac joints. The Latin name is fossae lumbales laterales ("lateral lumbar indentations"). These indentations are created by a short ligament stretching between the posterior superior iliac spine ...

  5. Bird anatomy - Wikipedia

    en.wikipedia.org/wiki/Bird_anatomy

    The anatomy of bird's respiratory system, showing the relationships of the trachea, primary and intra-pulmonary bronchi, the dorso- and ventro-bronchi, with the parabronchi running between the two. The posterior and anterior air sacs are also indicated, but not to scale. Inhalation–exhalation cycle in birds.

  6. Loin - Wikipedia

    en.wikipedia.org/wiki/Loin

    Loin. The loins, or lumbus, are the sides between the lower ribs and pelvis, and the lower part of the back. [1][2][3] The term is used to describe the anatomy of humans and quadrupeds, such as horses, [4][5] pigs, [6][7] or cattle. [8] The anatomical reference also applies to particular cuts of meat, including tenderloin or sirloin steak.

  7. Thecal sac - Wikipedia

    en.wikipedia.org/wiki/Thecal_sac

    The thecal sac or dural sac is the membranous sheath (theca) or tube of dura mater that surrounds the spinal cord and the cauda equina. The thecal sac contains the cerebrospinal fluid which provides nutrients and buoyancy to the spinal cord. [1] From the skull the tube adheres to bone at the foramen magnum and extends down to the second sacral ...

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