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…

How Do Our Bodies Move?

How is it that we’re able to move so freely and effortlessly without a conscious, concentrated effort? Your brain works in conjunction with your muscles, which in turn work with your skeletal bones to produce a wide variety of movements. The brain sends signals via the nervous system, including the spinal cord and nerves, to the muscles. The muscles then contract to create movement. Your…

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…