Information is relayed to the spinal cord or the brain by

Sensory neurons/cells located in the dorsal root ganglion.

Explanation: Sensory information from the skin, skeletal muscle and joints are relayed to the spinal cord and brain by sensory neurons/cells in dorsal roots, the dorsal roots enter the spinal cord in small bundles called dorsal rootlets. The cell bodies for these sensory neurons are packed closely together to form a structure called the dorsal root ganglion, which is located alongside the spinal cord.

it takes about 30 days for it to break down

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.