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 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
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.
There is no "r", prostrate means "prone on the ground". The prostate gland belongs to the reproductive system.
Endocrine
reproductive system male
You answered it yourself; it is the reproductive system.
reproductive system
They are both reproductive systems.
The reproductive system. Only with regards to the individual of course!
it has only one reproductive system