classification, Modern classification is part of the broader science of. taxonomy, the study of the relationships of organisms, which includes collection, preservation, and study of specimens, and analysis of data provided by various areas of biological research.
Undescended testicles (also known as cryptorchidism) is a condition in which one or both of a baby boy's testicles (testes) have not moved down into their proper place in the scrotum.
Shortly before birth, a boy's testicles usually descend into the scrotum. When a testicle doesn't make the move, this is called cryptorchidism, or undescended testicles.