When a man is stimulated for sexual activity, the sperm are mixed with seminal fluid - a whitish liquid produced by the seminal vesicles and the prostate gland - to form semen. As a result of the stimulation, the semen which contains up to 500 million sperm is pushed out of the penis (ejaculated) through the urethra.
That's true. Many STIs, like AIDs, are spread through any transfer of bodily fluids.
Answer:
What is involved in physical fitness? Physical fitness involves the optimal functioning of the circulatory, respiratory, and muscular systems. Cardiorespiratory fitness, muscular strength and endurance, flexibility, and body composition are measurements of physical fitness.
