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.
L1 Vertebra â definition and function. Sections. The L1 vertebra is located in the lumbar spine, which is in the lower back portion of the spinal column. Most people have five vertebrae in the lumbar spine, which connects the middle of the back to the pelvis or sacrum.The L1 vertebra is the first vertebra of the lumbar spine, causing it to experience more stress than other parts of the spine.The lumbar region is responsible for the support and stability of most of the bodyâs weight.he lumbar spine. The lumbar spine is the bottom of the vertebral column and is responsible for supporting most of the weight of the body. Over time, with age and weight gain, the vertebrae in the lumbar spine begin to compress with increased pressure.