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 ...

Why are my breasts different sizes? Is there anything I can do about it? It is normal to have different sized breasts. If you have just started developing breasts, one breast may grow more quickly ...

How Do I Take a Rectal Temperature? The best way to take a temperature in infants and young children is by taking a rectal temperature. Don't worry — it's a simple and safe process.

How much do you know about your muscles? Find out by taking this quiz!

This is a general outline of the milestones on the road to reading success. Keep in mind that kids develop at different paces and spend varying amounts of time at each stage. If you have concerns, ...

Heavy metals are elements that are found in soil, water, and the air we breathe. Plants take up these metals as they grow and can end up in the food we eat. Our bodies need some heavy metals (like ...

A parked car in sunny weather is like a greenhouse and heats up very quickly. Even on a mild, sunny day in the 60s, the temperature in a parked car can get dangerously high. Every summer, there are ...

From your nose to your toes, do you know how the body works? Take these quizzes to find out!

How much do you know about your brain? Find out by taking this quiz!

People who have symptoms of COVID-19 or who test positive for it (even without symptoms) should stay home and away from others to prevent spreading the infection. This is known as isolation. Keeping ...

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 ...

Walking pneumonia is a less serious form of the lung infection pneumonia. It's often caused by bacteria called Mycoplasma pneumoniae, but other bacteria or viruses can also cause it. Most kids with ...