The tail of a sperm remains with the head until the sperm goes into the egg to fertilise it.
DNA always remains in the sperm, that is how variation happens.
A sperm cells head is approximately 5 microns in diameter, its tail is approximately 50microns
Most are, so long as they remain properly attached to a live human.
Long tail for swimming, round head to dig into a egg
the shaft itself is 60" long. With a head attached it is 6ft.
Actually when sperm is outside the penis it is a pure white but on the inside it has like a round head and a long tail.
The epididymis is a long tube that is located near each testicle. The epididymis is the tube which moves the sperm from the testicles to the vas deferens.
It has a long tail that helps it swim easily to reach the ovum, It has a pointed tip in the head of the sperm which allows it to effectively enter the ovum.
It takes 2-3 months (about 74 days) for sperm to mature. Mature sperm gather in the center of the tubules, while the immature sperm remain on the outer edges of the tubules. The nurse cells continuously "sweep" sperm into the center as they mature. When the sperm mature, they leave the tubules and enter the epididymis, a coiled, tubular organ attached to the testes. Here, the mature sperm learn to "swim" and fine-tune their motility (movement). Mature sperm resemble microscopic tadpoles. They have an enzyme-coated head, a tail, and a thinner portion of the tail, called an end piece. Once inside the epididymis, mature sperm wait to be ejaculated into the vagina -- not unlike the scene depicted in Woody Allen's satirical film, Everything You Always Wanted to Know About Sex, where the sperm are waiting to "parachute" out of an aircraft and complete their mission. What happens to the sperm if no ejaculation takes place? They die and are reabsorbed by the body. This is as close as a man comes to having a "period."
How long does male sperm live
Sperm can remain in the reproductive tract for several weeks after a vasectomy. It is recommended to use an alternative form of contraception until follow-up tests confirm that the semen is free of sperm.
Sperm can survive for a short period of time on external surfaces like toilet paper, but their ability to fertilize an egg decreases rapidly outside the body due to exposure to air and other external factors. It is unlikely for sperm to remain viable for long on toilet paper.