lumen is just the cavety within a tubular organ. so in the reproductive system the like the male's vas deferens or female's fallopian tubes
The reproductive system...
The digestive system features lumen in the gastrointestinal tract. Absorption is the passage of digested end products from the lumen of the GI tract through the mucosal cells into the blood or lymph.
The reproductive system also known as genital system is a system that enables people to produce offspring. Many non-living substances like hormones, pheromones and fluids are also essential accessories to the reproductive system.
The eiodidymis is part of the male reproductive system
Sperm is part of the reproductive system, specifically the male reproductive system.
Endocrine
There is no "r", prostrate means "prone on the ground". The prostate gland belongs to the reproductive system.
reproductive system
You answered it yourself; it is the reproductive system.
reproductive system male
They are both reproductive systems.
it has only one reproductive system