Kirsty wants to be a lawyer, but even getting to class seems to be a bit much sometimes. Having a boyfriend who wants her to stay home with their baby doesn't help the situation.
When Oxford University scientist Hugh Sinclair claimed in the 1940's that the fatty acid Omega-3 found in fish was good for your health, he was ridiculed and lost his university post. But times have changed and this documentary looks at how Omega-3 is now being hailed as a panacea.
In this program, Professor Robert Winston looks at the physical changes brought about by puberty. Footage shot inside the body reveals how sexual development accelerates, periods start, voices break, and spots and body odour make their first appearance as hormones surge through the system.
This short clip explains what the nervous system is, how it controls messages between our senses, muscles and the brain, and even reflex actions.
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