Michael Mosley embarks on an astonishing voyage through the world's most complex organism – humans. He brings to life the very latest scientific advances by combining spectacular CGI with fascinating human stories.

Inside The Human Body starts with the story of our creation, swimming with millions of sperm on their long and dangerous journey to fertilise a single egg and discovering the ingenious ways a woman's body takes control to select the very best. Michael meets two mothers: one who has borne 16 children and has been pregnant for more than 12 years in total; and Diane, from Leeds, who has beaten odds of 10,000 to 1 to conceive non-identical triplets.

The programme explains that, to create a body, one single cell multiplies to one hundred trillion cells; and cameras are on hand as Diane sees her 23-week-old triplets in the womb in extraordinary 3D detail for the very first time.

The story of Ronnie and Donnie, the world's oldest conjoined twins (aged 59), helps viewers understand the rarities that sometimes occur as an embryo divides; and, in a TV first, Human Bodies uses data from the scans of developing embryos to show how the human face develops. The programme also travels to India to discover how cleft palates are caused by the embryonic face failing to fuse together properly during a tiny window of just a few hours.

In a dramatic finale, Inside The Human Body follows 26-year-old Nkosi as she faces the dangers of childbirth in Rwanda, and Diane, in the UK, as she gives birth to her triplets.

Inside The Human Body is simulcast in HD on BBC One HD on Freesat channel 108, Freeview channel 50, Sky channel 143 and Virgin Media channel 108.

VAA

To top