Reactants and Products in Chemical Reactions. In a chemical reaction, substances (elements and/or compounds) called reactants are changed into other substances (compounds and/or elements) called products. You canât change one element into another in a chemical reaction â that happens in nuclear reactions.
The pudendal nerve is the main nerve of the perineum. It carries sensation from the external genitalia of both sexes and the skin around the anus and perineum, as well the motor supply to various pelvic muscles, including the male or female external urethral sphincter and the external anal sphincter.he pudendal nerve passes between the piriformis muscle and coccygeus (ischiococcygeus) muscles and leaves the pelvis through the lower part of the greater sciatic foramen. It crosses over the lateral part of the sacrospinous ligament and reenters the pelvis through the lesser sciatic foramen.
The function of the vagus nerve is to send signals between the  brain and the many systems of the body. The vagus nerve is a very  important nerve in the brain.Edit. It carries messages to and from the brain and regulates internal organs, such as the stomach and heart. 2  Alcohâ¦. 3  Determining the Causes of Gastroparesis The human stomach is designed to receive chewed food, which it then churns, dissolves, and partially digests.