Vas Deferens
To learn more on sperm and its development check out en.wikipedia.org/wiki/Sperm
Healthy Sperm cells tend to move in a "forward" motion, thus directly moving towards the mature and released eggs.
SEMiNIFEROUS TUbES
Sperm cells are zygotes (specialised cells with only 23 chromosomes).
The main function of the efferent ducts is to transport sperm from the rete testis to the epididymis. These ducts are a series of small tubes that connect the testicular network of tubules (rete testis) to the epididymis, where sperm undergo maturation and storage. Additionally, they play a role in reabsorbing fluid, which helps concentrate the sperm as they move toward the epididymis.
From the related link: They connect the left and right epididymis to the ejaculatory ducts in order to move sperm.
Sperm fully mature in the epididymis, a coiled tube located on the back of each testicle. The fructose that provides energy for sperm to move their tails is produced by the seminal vesicles and released into the semen, which nourishes and supports sperm during ejaculation.
After sperm is produced, it travels through the testes through sperm ducts that circle the bladder, a gland called the seminal vesicle provides sperm with a fluid. This fluid supplies the sperm with an energy source and helps them move.
The move in such as way as to propell individual cells such as sperm cells.
The seminiferous tubules are the tiny tubes where the sperm are made. From there, sperm move to the tubular epididymis for maturing. The mature sperm move from the epididymis to the vas deferens and then, during ejaculation, into the urethra.
Sperm cells have an immature stage in the testes and maturation occurs as the sperm move through the testicular system. There can be multiple reasons for ejaculate to contain immature sperm cells. The mechanical reason is high frequency of intercourse. Another reason for failure would occur in the epididymis where the Sertoli cells facilitate maturation. Causes can be adult mumps, hormonal issues, drugs/medication, radiation, genetic anomalies and excess heat.
Once sperm cells are produced in the male reproductive system, they travel through the epididymis, where they mature and are stored. From there, they move into the vas deferens, which transports the sperm during ejaculation. The vas deferens then connects to the ejaculatory duct, where sperm mixes with seminal fluid before being expelled through the urethra.