This system consists of a cord on each side closely following the
course of the systemic arches and the dorsal aorta. It has on it six
ganglionic swellings, and there are connections between the ganglia
and all the spinal nerves. Anteriorly each of the cords is joined to
the vagus nerve; it ends posteriorly as a broad swelling on the ninth
spinal nerve.
[_In the Frog the system consists of a chain of ganglia on each side
of the body closely following the course of the systemic arches and
the dorsal aorta. The cords have connections with the spinal nerves.
Anteriorly each cord ends in the Gasserian ganglion of the trigeminal
nerve and posteriorly it is united with the coccygeal nerve by a
varying number of branches._]
Make a complete sketch showing the spinal nerves and the sympathetic
nervous system.