A sperm cell has a small agile tail which swings to and fro to push the cell forward. This tail helps it to move. Unlike the sperm cell the egg cell doesn't move since when the sperm cell unites with it the food is provided by the egg cell.
From when it is created. It moves inside the semen.
capacitation
Ameboid movement
spirochetes
Yes, sperm taken from the testes are capable of fertilizing an ovum. Usually this process is done In vitro Fertilization or IVF.
Sperm within the testicle itself are not capable of fertilizing an ovum on their own. They complete the maturation process in the epididymis.
spirochetes
spirochetes
Sperm cell.
It is because the cilia and flagella are a hairlike shape, and they can move either swiftly like a whip or stiffly like the oar of a ship that they are useful. They are capable of movement and they can act as sweepers, like in our respiratory tract, maintaining our lung health; or give sperm movement.
Viable sperm is sperm that is capable of fertilizing an egg and resulting in, when combined with a viable egg, offspring. Hope this helps!
animate
Plankton?