180 



Basic Structure of Vertebrates 



Fig. 158. Diagram of the nerve components of a spinal nerve. Somatic motor 

 fibers are indicated by continuous lines; visceral motor by long broken lines; 

 somatic sensory by short broken lines; visceral sensory by fine dotted lines. (After 

 Froriep. Courtesy, Patten: "Embryology of the Pig," Philadelphia, The Blakiston 

 Company.) 



