The sexual organs inside a man’s body (internal sexual organs) are:
The man has 2 testicles: one of the testicles can be smaller than the other one and hang a bit lower.
The man has 2 epididymides.
Each one is connected to one testicle.
In the epididymides the sperm cells are collected and grow.
The man has 2 sperm ducts.
Each one is connected to one epididymis.
They transport the sperm cells to the prostate.
The prostate lies below the bladder. It is the size of a strawberry.
Fluid is added to the sperm cells in the prostate.
The man has 2 seminal vesicles. They lie next to the prostate.
They add more fluid to the sperm cells. Together the seminal fluid and the sperm cells make up the semen.