Male Reproductive System – Introduction

General The male reproductive system tissues include testes, epididymides, the various accessory sex glands, and the penis. These tissues exhibit direct and indirect (usually hormonal) pleotrophic pathologic responses, often with a change in one reproductive tissue accompanied by changes in other reproductive tissues. The majority of the male reproductive tissues are paired, allowing identification of unilateral versus bilateral responses. Artifacts are rare and typically reflect the use of less than ideal fixatives for testes (modified Davidson’s fixative is preferred) or physical damage, including drying out of tissues, during the weighing process prior to fixation.