How do hormones work?

What are hormones, and what do hormones do? Over our lifetimes, our bodies undergo a series of extraordinary metamorphoses: we grow, experience puberty, and many of us reproduce. Behind the scenes, the endocrine system works constantly to orchestrate these changes. Hormones are messengers that are released mainly by glands, and they travel in the bloodstream…

Flu Attack!

When you get the flu, viruses turn your cells into tiny factories that help spread the disease. First, some new viruses get caught in mucus and other fluids inside your body and are destroyed. Other viruses get expelled in coughs and sneezes. Second, lots of those new viruses are lemons. They don’t work that well.…

What is Flu?

Is it just a cold or the serious flu? Influenza, commonly known as the flu, is a contagious respiratory illness caused by viruses that infect the nose, throat, and lungs. It can range from mild to severe. Experts believe that influenza usually spreads through droplets that are created when those with the flu cough, sneeze or…

What is common cold?

We’ve all had a cold at one point or another; it entails an uncomfortable cocktail of symptoms like sneezing, coughing and a runny nose. But why do we get colds? How do they work? A runny nose, scratchy throat, and nonstop sneezing — you can’t miss the signs of a cold. But mystery shrouds a…

What if you never sweat?

Sweating is essential to human life, but why do we NEED to do it? Sweat is essential to human survival because it serves as the body’s coolant. Some people aren’t able to sweat typically because their sweat glands are no longer functioning properly. This condition is known as hypohidrosis or anhidrosis. It can affect your entire body, a single area, or scattered areas. The inability to sweat…

Does Being Cold Make You Sick?

In terms of infectious illnesses, germs make you sick, not cold weather itself. You have to come in contact with rhinoviruses to catch a cold. And you need to be infected with influenza viruses to contract the flu. Rhinoviruses peak in spring and fall, and influenza viruses peak in winter. While wrapping a scarf around your nose to warm it up might help…

Why do you get a fever?

It’s that time of year again when we all have the sniffles. Except of course if you are fortunate enough to live below the equator, South Africa and Australia subs that means you! Back to us people living above the equator, the winter chill has set in and you start sneezing and coughing and spluttering,…

Why do our knuckles pop?

Some people love the feeling of cracking their knuckles, while others cringe at the sound. But what causes that trademark pop? And is it dangerous? When you “crack” your knuckles or any other joint, it expands the space between your bones, creating negative pressure that draws synovial fluid into the new gap. This influx of synovial fluid…