Science Questions

Why is urine hot or warm when you excrete it? Gobi

It’s been stored in your body which is that fantastic body temperature of 37 degrees.  It’s like keeping something in an incubator, it’s nice and warm.  When it comes out, it’s still warm.  Because your skin is cooled by the air, anything at 37 degrees feels hot against your skin.  You’ll notice this if you put your hand in some water that is 37 degrees, it doesn’t feel the same.  It feels warmer than blood heat.

March 2008