I've always wondered: what's behind the belly button?

We're constantly told what not to do with it, but what exactly is behind this mysterious orifice?

Anterior Placenta: What It Means for Mom and Baby

Here's Why It Feels Weird When You Poke Inside Your Belly Button

Darwin Hypnobirthing

Sydney Sweeney on the Storytelling Potential of Hair, from 'Euphoria' to 'Immaculate

Hidden Secrets Of belly button

Darwin Hypnobirthing

科学网-不能抠的肚脐眼，究竟藏了什么秘密？-张磊的博文

不能抠的肚脐眼，究竟藏了什么秘密？_手机搜狐网

Darwin Hypnobirthing

Your Stories

Belly button – News, Research and Analysis – The Conversation – page 1

不能抠的肚脐眼，究竟藏了什么秘密？ - 壹读