Your hair isn't just something you have to deal with every morning, it's a part of who you are, and there are things it can tell you about your personal health. Hosted by: Hank Green

Not everyone who is infected by a cold virus actually shows symptoms. In fact, people who seem to experience symptoms like a sore throat and stuffy nose more often may actually have more robust immune systems!

Your hair isn't just something you have to deal with every morning, it's a part of who you are, and there are things it can tell you about your personal health. Chapters DANDRUFF 0:52 2 GENERAL HAIR LOSS 4:11 PATCHY HAIR LOSS 4:29...

When talking about the brain, neurons have been dazzling scientists for a long time. But behind every successful neuron is a glial cell - particularly one type of them: microglia.

Ok, we are ready to investigate the immune system! So where do we start? Rather than starting on the big objects, like the organs in the lymphatic system, the best way to dive in is to briefly discuss the different types of cells that...