"Phrenic nerve" Quotes from Famous Books
... The last four and the first thoracic (spinal) contribute to a leash of nerves running out to the fore limb, the brachial plexus (plexus, literally network, but here meaning a plaited cord). The fourth cervical also sends down a phrenic nerve (p.n., Figure 1), along by the external jugular vein and the superior caval vein to the diaphragm. The last three lumbar and the sacral nerves form a sacral plexus, supplying ... — Text Book of Biology, Part 1: Vertebrata • H. G. Wells |