Question

what merges together to form a spinal plexus?
a) ventral and dorsal rami
b) ventral and dorsal roots
c) several levels of dorsal rami
d) several levels of ventral rami

Explanation:

Spinal plexuses are formed by the merging of ventral rami (the anterior branches of spinal nerves) from several spinal cord levels. Dorsal rami supply the posterior trunk muscles and skin. Ventral and dorsal roots merge to form spinal nerves, not plexuses. Dorsal rami alone do not form plexuses.

Answer:

D. Several levels of ventral rami