How does breathing allow large amounts of oxygen into the blood?

air sacs

Explanation:

Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. From there it is pumped to your lungs so that you can breathe out the carbon dioxide and breathe in more oxygen.

In a nutshell, cyanide prevents cells from using oxygen to make energy molecules.

Explanation:Cyanide refers to any chemical containing a carbon-nitrogen (CN) bond. Many substances contain cyanide, but not all of them are deadly poisons.

Without the ability to use oxygen, mitochondria can't produce the energy carrier adenosine triphosphate (ATP). Tissues that require this form of energy, such as heart muscle cells and nerve cells, quickly expend all their energy and start to die. When a large enough number of critical cells die, you die.