A sperm cell is one of the smallest cells in the body. It has a head, a power pack, and a tail for swimming.
Drag to turn it around. Use the buttons to zoom in and try things from the lessons.
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Spermatozoa is the science name for sperm cells. They are made in the testes, starting when someone grows up.
A sperm cell is one of the smallest cells in the human body. An egg cell is one of the biggest!
Sperm cells carry half of the instructions (DNA) needed to make a baby. An egg cell carries the other half.
When a sperm cell and an egg cell join, a baby can start to grow. That is why you have some things in common with each of your parents.
Press Swim! on the 3D model to see the tail move.