Final answer:
The connective tissue layer surrounding each fascicle within a nerve is called the Perineurium. It acts similarly to connective tissues in muscles, providing protection and support, and facilitating nutrient and oxygen exchange with blood vessels. The correct option is 2) Perineurium
Step-by-step explanation:
The layer of connective tissue around each fascicle of nerves is called the Perineurium. Nerves in the peripheral nervous system (PNS) are organized into bundles called fascicles, which are akin to cables containing multiple insulated wires.
These fascicles are ensheathed by the perineurium, providing them with protection and support. Within the structure of a nerve, there are three connective tissue layers: the epineurium, which encases the entire nerve; the perineurium, which surrounds each fascicle; and the endoneurium, which encloses individual nerve fibers within the fascicle.
These connective layers are critical as they not only protect nerve fibers but also provide a scaffold for blood vessels, thereby facilitating nutrient and oxygen exchange which is essential for nerve function. The correct option is 2) Perineurium