Hi there kiddo, today we are going to learn about something called the Endometrium. It's a big word, but I am going to explain it to you in a way that makes sense, just like when you learn new words in school.
So first, let's talk about what the uterus is. The uterus is an organ in a woman's body where a baby grows when a woman is pregnant. The uterus has a lining called the endometrium. Think of the inside of the uterus like the inside of our house, the endometrium is like the wallpaper that lines the walls.
Now, the thing about the endometrium is it's always changing. It starts off thin and then thickens as the body gets ready for a baby. But if there's no baby, then the body doesn't need the endometrium anymore. So, it sheds it and starts all over again.
This process of shedding the endometrium is called menstruation, which happens every month. When the endometrium sheds, it's like taking down the old wallpaper and putting up new wallpaper.
So that's the Endometrium in a nutshell. It's basically the lining of the uterus that gets thicker or thinner depending on whether a woman is pregnant or not. And it sheds every month during menstruation.