Question

Why did blood carry oxygen and why did fan give us air

Answer 1

These specialised cells are like flattened discs, which gives them a much greater surface area with which to exchange oxygen and carbon dioxide in the lungs and with body cells. Red blood cells are able to carry oxygen so efficiently because of a special protein inside them: haemoglobin.


All the electricity that is driving the fanturns directly into heat. So a fan does not cool the room at all. ... By blowingair around, the fan makes it easier for the air to evaporate sweat from your skin, which is how you eliminate body heat. The more evaporation, the cooler you feel.

Answer 2

blood not only carries oxygen but also carries CO2....

the blood cells contains haemoglobin ..which has affinity about O2 and CO2...

the fan moves by electrical energy pass the present air downward...