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Season 1 Episode
- Season 1 The Planet Cell
- Season 1 Birth
- Season 1 The Body Sentinels
- Season 1 The Bone Marrow
- Season 1 The Blood
- Season 1 The Tiny Platelets
- Season 1 The Heart
- Season 1 Breathing
- Season 1 The Brain
- Season 1 The Neurones
- Season 1 The Eye
- Season 1 The Ear
- Season 1 The Skin
- Season 1 The Mouth and the Teeth
- Season 1 The Digestion
- Season 1 The Liver Factory
- Season 1 The Kidneys
- Season 1 The Lymphatic System
- Season 1 The Bones and the Skeleton
- Season 1 The Muscles and the Fat
- Season 1 Toxin Wars
- Season 1 The Vaccination
- Season 1 The Hormones
- Season 1 The Chain Of Life
- Season 1 Repairs and Changes
- Season 1 And life goes on...
Once Upon a Time... Life - Season 1 Episode 8 Breathing
7.90 26 minutes Air bubbles travel from the nose to the lungs. In the swampy, mucus-filled areas, they meet the red blood cells that transport them around the body.
