Out of Control: It's estimated that one out of four people suffer from some form of allergy - but few reactions are as severe as Phoebe's, a young woman who has been stung by a jellyfish. As her immune system launches a full-scale assault on the toxins, travel through her bloodstream to examine the plan of attack.
Take a provocative look at the varied and complex processes that go on inside all of us - from the way our natural defense systems treat injuries to the everyday functions our bodies carry out.
Spreading Menace: While eating at a friend's birthday party, Mike ingests Salmonella bacteria and falls ill. Follow the trail of the invading microbes through the digestive system - from the mouth to the lower intestine - and examine the body's formidable arsenal of weapons designed to combat these tiny terrors.
Teen Dreams: Follow the flow of hormones - from pituitary glands on through the bloodstream - of two young teens, Darren and Natalie, as the dramatic effects of puberty unfold. The month culminates with Natalie's first menstruation and a weekend party - during which Darren's body seemingly does everything it can to ruin his chances with Natalie.
