Which connective tissue layer directly surrounds each axon in a nerve?
a. myoneurium
b. endoneurium
c. perineurium
d. epineurium

Endonerium

Explanation:

The endoneurium (also called endoneurial channel, endoneurial sheath, endoneurial tube, or Henle's sheath) is a layer of delicate connective tissue around the myelin sheath of each myelinated nerve fiber in the peripheral nervous system. Its component cells are called endoneurial cells.The endoneuria with their enclosed nerve fibers are bundled into groups called nerve fascicles, each fascicle within its own protective sheath called a perineurium. In sufficiently large nerves multiple fascicles, each with its blood supply and fatty tissue, may be bundled within yet another sheath, the epineurium.

when a ball attached to a string it can imitate a plant when spinning really fast in the air. since your hand could represent the sun, and the ball a planet. showing you how a plant would orbit either the sun or how the moon orbits the earth.