Labial adhesions happen when the labia minora (the inner folds of skin surrounding the vaginal opening) become fused together. In most cases, only a small part of the labia is fused, so the adhesions ...

How Does Air Enter the Respiratory System? Air enters the respiratory system through the nose or the mouth. If it goes in the nostrils (also called nares), the air is warmed and humidified. Tiny hairs ...

Answering kids' questions about sex is a job many parents don’t look forward to. It may feel awkward when it comes to talking about puberty and where babies come from. But don’t avoid these topics.

We see and hear about hearts everywhere. A long time ago, people even thought that their emotions came from their hearts, maybe because the heart beats faster when a person is scared or excited. Now ...

Toe walking is when kids walk on the balls of their feet, with their heels off the ground. It’s common in toddlers as they learn to walk. Most children stop toe walking on their own by age 2. Toe ...

Just about every guy wonders how he measures up "down-there." Here's the lowdown for any guy who's ever worried about whether his penis is a normal size. There is a wide range of normal penis sizes.

An erection is when the penis gets hard because sponge-like tissue in it fills with blood. Erections tend to make the penis get bigger and stand away from the body. Erections can go away on their own ...

Flat feet are feet that do not have an arch. The middle of the foot touches the ground. Feet with no arches is the main sign of flat feet. Sometimes, flat feet can cause foot, ankle, or knee pain.

It’s normal for people to masturbate (touch or rub their own genitals because they like the way it feels). Some people do it to relieve stress or tension. It’s nothing to be ashamed of or embarrassed ...

How Does the Brain Work? And How Does the Nervous System Work? How do you remember the way to your friend's house? Why do your eyes blink without you ever thinking about it? Where do dreams come from?

Tummy time is laying babies on their stomachs for brief periods while they're awake. It's an important way to help babies strengthen their neck and shoulder muscles, and improve motor skills. Be sure ...

Is it Safe to Use Household Chemicals During Pregnancy? Some household cleaners and chemicals are safe to use during pregnancy while others are not. Chemicals like ammonia and chlorine might cause ...