blood a pump (the heart) to push the blood around the body a system of tubes to contain the blood (arteries, veins and capillaries) The blood is the transport medium – it carries substances to ...

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 ...

In each cubic millimetre of blood, there are more than five million red blood cells, thousands of white cells and 250,000 to 450,000 platelets for blood clotting. Every second, 2.5 million new red ...

George Washington died after his physician treated his sore throat with bloodletting, but don't let that stop you from ...

Previously, researchers studied the effects of snake venom on blood vessels by using cultured endothelial cells, the cells that make up the wall of vessels. However, these so-called static models fail ...

its exact role in the endothelial cells that make up the circulatory system, the formation of new blood vessels (angiogenesis) and vascular function was not yet known. "The study reveals for the ...