Explanation: Phrenic. The phrenic nerve is the motor and sensory supply to the diaphragm. The iliohypogastric and ilioinguinal nerves supply the skin and musculature of the lower abdominal wall.
Explanation: Pharynx. Within the pharynx the air channel divides anteriorly from the food tube behind, and food is prevented from entering the airway by the epiglottis.
Explanation: All of the above. The spermatic cord consists of five layers: (1) external spermatic fascia, (2) cremaster muscle, (3) internal spermatic fascia, (4) loose areolar tissue, and (5) remnants of the processus vaginalis.