Butterflies also act as a lower member of the food chain. They are a hearty meal for a number of animals, including birds and mice. As populations of butterfly diminish, so will populations of birds and other animals that rely on them as a food source.
The conus medullaris (Latin for medullary cone) is the tapered, lower end of the spinal cord.It occurs near lumbar vertebral levels 1 (L1) and 2 (L2), occasionally lower. The upper end of the conus medullaris is usually not well defined.After the spinal cord tapers out, the spinal nerves continue to branch out diagonally, forming the cauda equina.onus medullaris syndrome is a collection of signs and symptoms associated with injury to the conus medullaris. It typically causes back pain and bowel and bladder dysfunction but weakness and sensory loss is uncommon.
In neonates, the spinal cord terminates at the end of the vertebral column or the lumbosacral junction. Note, however, that the location of the terminal end of the spinal cord, or the conus medullaris, varies as the infant develops. During infancy the spinal cord terminates between the first and third lumbar vertebrae, whereas in adults it is positioned between the 12th thoracic and the second lumbar vertebrae.