I’ve been allergic to fleas ever since I was a kitten. Flea bites give me an itchy, red rash.
I talked about why that happens with my friend Bevan Briggs. He’s a nurse practitioner and professor at Washington State University. Nurse practitioners are nurses with advanced training. They diagnose illnesses, order tests and prescribe medicine.
Briggs told me that often rashes happen when the immune system gets turned on. The immune system is the body’s defense system.
“It's the way our body tries to protect us from germs and poisons,” he said. “Rashes happen because your immune system identifies something as foreign—either an infective agent or some kind of toxin.”
Whether you have an innie or an outie, pretty much all us mammals have a belly button. But before you had a belly button, there was actually a different bit of anatomy in its place.
While you were still growing inside of your mother, a small, bendy tube on your tummy connected the two of you. This tube is how you got pretty much everything you needed to grow before you were born into the world. Read More ...
At this very moment, several quarts of blood are circulating through your body at nearly 4 mph. But as you’ve pointed out, not everyone’s blood is the same.
Your question made me wonder exactly what we mean when we talk about blood types. I decided to ask my friend Amber Fyfe-Johnson, a researcher at Washington State University who studies cardiovascular diseases--diseases of the blood vessels-- in kids.