Sperm
Sperm explained in an easy to understand way:

Imagine trying to find a specific book in a massive library without a map. Just as you navigate through countless shelves to locate the book, sperm navigate through the vast female reproductive system to reach the egg. Each sperm is like a determined reader, seeking its target amidst a multitude of distractions and obstacles, much like finding that one book in an endless sea of information within the library.
Practice Version

Sperm: The sex cell produced in male reproductive organs. Sperm are tiny cells that carry genetic information from males to females for reproduction.