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Animals living in harsh environments may have adaptations to help them survive. For example, animals living in hot conditions, like camels, have many features to help them survive. Camels have humps which...

Vaccines contain an inactive form of a pathogen, or dead pathogen, and are injected into the body to give immunity to that pathogen. The inactive pathogen acts as an antigen, stimulating an immune respons...

Inside the kidneys there are millions of nephrons which filter the blood. They do this by having blood build up a high pressure in the glomerulus (a ball of capillaries) so that the small molecules (e.g. ...

Your heart pumps blood from its left side, through the aorta (the main artery leaving the heart) and into the arteries. The blood travels through your arteries, which divide off into smaller and smaller b...

plants uses carbon dioxide during photosynthesis. plants use carbon to make carbohydrates and cellulose. animals then eat plants and carbon is passed down. Animals then respire and release carbon dioxide ...