The largest cell in the human body is the female ovum, also known as the egg cell. This reproductive cell is about 0.1 mm in diameter, making it 20 times bigger than sperm cells.
The ovum is involved in reproduction, carrying the female genetic material necessary for fertilization and the creation of a new organism.
It's important to note that while the female ovum is the largest cell in the human body, it's not the largest cell overall. There are single-celled organisms like the Thiomargarita namibiensis bacterium, which can grow to several millimeters in diameter.