DNA From The Beginning



Within the human body we have 60,000 miles of blood vessels. We have three types of cells in the blood, red, white, and platelets. Red blood cells transport oxygen throughout the body while white blood cells help protect us against infection. Platelets are involved in clotting. When you get a cut your vessels send out signals calling for for platelets and proteins to help in clotting. In addition, white blood cells also come to the rescue. A blood clot is a group of chemicals and cells that work together to stop the flow of blood in a small area. All More >

C. elegans roundworm

Aging Eggs

C. elegans Roundworm

The aging process is, and always will be fascinating to us.  It’s role in an organism’s ability to reproduce is currently being studied in worms at Princeton University. The microscopic roundworm C. elegans lives for about 21 days.  For the first nine of these days, hundreds of eggs are fertilized producing an abundance of offspring!  After day nine, the many remaining eggs won’t be used, as their quality is poor and they cannot produce viable embryos.  A process similar to this takes place in humans.  Women experience a sharp decline in fertility in their late 30’s. In worms and in humans More >



What do you think of when someone says virus?  Most people would say infection, getting sick, germs, and other negative associations.  Not only are viruses a valuable tool in research, they offer a look into history and also our own bodies.  I’ve recently become a bit obsessed with learning more about them.  Part of it is that I thought I knew more than I did.  There is a huge amout of information just waiting to be uncovered.  Too often we think we know something and it prevents us from learnng more.  Even something simple like having the chicken pox…

I remember More >


Taste Receptors in Lungs

There are bitter taste receptors lining the smooth muscle that surrounds airway passages   that lead to the lungs.  These are the same receptors found on the tongue.  It is well known that the ability to taste bitter has evolutionary benefits.  For example, bitter tasting toxins can be detected in foods, and thereby avoided or at least regulated; meaning you won’t eat too much of something that tastes really bad!

Interestingly enough, inhalable toxins can be detected in airways, just like they would be on the tongue. The airway response to detection is what’s most interesting.  One school of thought is that More >