정자와 남성 호르몬을 생성하는 수컷의 생식 기관.
The male reproductive organ that produces sperm and male sex hormones such as testosterone.
예문:
"Each testis is contained within the scrotum to maintain an optimal temperature for sperm production."
"The testis serves both an exocrine function by producing sperm and an endocrine function by secreting hormones."
"A physical examination of the testis is a routine part of a male health checkup."