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The blood capillaries surrounding the alveoli of the lungs provide them with a rich supply of flowing blood. This means that the oxygen depleted blood returning from the body picks up oxygen from inside t...
The alveoli are the site of gas exchange in the lungs. Oxygen diffuses into the blood down a concentration gradient while carbon dioxide exits the lung by diffusion. Alveoli have a very large surface area...
Glycogen is a highly branched polymer of glucose that stores sugars for respiration. Its branched ends allow rapid hydrolysis and release of glucose monomers, and it is <...
A stent is a small cylinder wire mesh that is inserted into the blood vessel and expanded. This opens the middle of the blood vessel, allowing greater blood flow,...
The immune system protects you against invading pathogens and infections that may enter your body. It can be broadly split into two streams - the adaptive and the innate immunity. The innate immunity is m...
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