hair-follicle

例句：

1. 1.The hair follicles on the scalp are constantly being stimulated by the hair growth cycle.
   头皮上的毛囊不断地受到头发生长周期的刺激。
2. 2. Hair follicles play a crucial role in the body's immune system.
   毛囊在身体免疫系统中起着至关重要的作用。
3. 3. The doctor removed the hair follicle and performed a minor surgery to remove the tumor.
   医生切除了毛囊，并进行了一次小手术来切除肿瘤。