Well, the blood has to be kept moving around all the time because it's the body's delivery system. Every possible part of the body has to be supplied with oxygen and food and water, and the veins and ...

Red blood cell Carry oxygen Contain haemoglobin (rich in iron) to carry oxygen. Biconcave shape to provide a large surface area for the diffusion of oxygen. No nucleus to provide more space for ...

carries food (nutrients) and oxygen to all the cells of the body carries away waste products that the body needs to get rid of Without a blood supply, cells and body tissues die. The blood flows ...

Ageing known to be major risk factor for poor health. Many of us have gazed at a baby and marvelled at the perfection of new life – but 40 years on, that baby will be showing signs that age catches up ...

Quirks and Quarks19:53Our planet’s circulatory system depends on animals eating, excreting and expiring From the tiniest insects to the largest whales, biologist Joe Roman says animals play an ...

Constantly Cold Feet? It’s Not Always Just a Chill Constantly cold feet aren’t always due to harmless shivering. Sometimes, ...