From air, water to food and ... impacts on human health. A recent study found that microplastics that are ingested spread from the gut to the brain, kidneys, liver and other organs.

Find out about the different stages of a human life cycle and how we change as we grow up. Find out how the skeleton helps us move and protects some of our important organs ... food gets into the ...

But after the microbes are through eating those organs, that bile starts to flood the body ... normally help digest the food you eat. So they escape. First, they travel from the lower intestines ...

From the heart's blood-pumping ability to the liver's filtering power, each component of the human ecosystem forms an integral part of the larger machinery. To break down our food, to regulate ...