Final answer:
The Conus medullaris is the inferior point of termination of the spinal cord. The Cauda equina is a collection of nerve roots at the inferior end of the vertebral canal. The Filum terminale anchors the spinal cord to the coccyx.
Step-by-step explanation:
The Conus medullaris is the inferior point of termination of the spinal cord in an adult. It is located at the level of the first or second lumbar vertebra.
The Cauda equina is a collection of nerve roots at the inferior end of the vertebral canal. It resembles a horse's tail and is made up of the spinal nerves that continue to grow as the vertebral column grows.
The Filum terminale is a thin strand of fibrous tissue that anchors the spinal cord to the coccyx. It provides stability and prevents excessive movement of the spinal cord.
The Cervical enlargement is the region of the spinal cord where nerves serving the upper limbs arise. It is located in the cervical region of the spinal cord, corresponding to the levels C4 to T1.