Mitochondria age differently depending upon whether they’re located in the liver, heart, or kidney, scientists find in flies and mice. A long-term study finds that moon cycles and menstrual cycles ...

This process requires specialized organs such as the lungs or gills. This oxygen is used for cellular respiration and metabolism, a byproduct of which is carbon dioxide. In the Human Phenotype ...

Both need water and air. We often think of animals using oxygen and glucose for cellular respiration and producing carbon dioxide. Similarly, we might think of plants using carbon dioxide and sunlight ...

It delivers oxygen and glucose to the tissues for respiration, which is the release of energy to cells. This video is about how arteries carry blood away from the heart. Find out more about GCSE ...