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.
Contains the spinal cord from the brain stem to the upper lumbar spine. There is no spinal cord in the lower lumbar spine. At the L1 level, the spinal cord terminates as the conus medullaris. A bundle of nerves called the cauda equina (meaning horse's tail) branch off the conus medullaris.These nerve roots are suspended in the fluid-filled dural sac.2 Thoracic vertebra (T1-T12). 5 Lumbar vertebra (L1-L5). The sacrum and coccyx are made up of 9 fused vertebrae. Each vertebra is attached to the one above and below it by ligaments and muscles and is separated from the vertebra above and below it by an intervertebral disc.