Virtual Lab: Pig Dissection

The image is that of a flowchart tracing the pathway of sperm from the testes to the preputial orifice.

Sperm production begins in the testes in a highly compacted mass of tubes called the seminiferous tubules. Sperm produced in the seminiferous tubules are then stored in structures called epididymae. When ejaculation begins, the stored sperm moves into paired tubes connected to the epididymae called vas deferentia. The sperm travel through the vas deferentia, where various glands add ejaculatory fluids to the urethra. From the urethra, the semen (sperm with ejaculatory fluids) leaves the body through the preputial orifice.