Rabbit skin is very thin so extra care is taken not to incise this area too deep. It consists mostly of fat and some small blood vessels. To reach the testicles the SQ tissue must be gently dissected along this white line. Eventually the structure surrounding the spermatic cord is identified and brought out through the incision. The testicle is to the left, still in the scrotum.
Rabbits are unique in that they have a large inguinal ring.
This ring is the opening the testicle passed through on its passage out of the abdomen at a very young age. It needs to be sutured closed or there is a chance of a hernia of abdominal organs through it. This suture is closing the passage at the ring. Since rabbits are chewers we sometimes place stainless steel sutures in the skin. They cause minimal tissue reaction and are very strong.