Biology · HUMAN REPRODUCTION

The testes in adult human males are situated outside the abdominal cavity within the scrotum. What is the primary physiological significance of this anatomical position?

1. To protect the testicular lobules from high intra-abdominal pressure
2. To maintain a temperature \( 2\text{--}2.5\;^\circ\text{C} \) lower than internal body temperature for spermatogenesis
3. To facilitate the rapid transport of androgens directly into the bloodstream
4. To provide extra space for the storage of millions of mature spermatozoa