The heart is highest, followed by the kidneys, then the brain, and then the liver.
The brain !!
Oxygen is needed for aerobic respiration in the mitochondria in our cells. Therefore, it would be reasonable to assume that the cells which respire most need the most oxygen ie. our muscles. The muscles need far more oxygen relative to other systems in our body, due to the fact that they respire most. This is especially true during rigorous exercise.
gut
Yahhh livaaa
The most important organ of our respiratory system is the Lungs. The lungs are the organs that extract or absorb oxygen from the air we breathe and fills our blood with life giving oxygen.
Aerobic respiration is a process that requires oxygen. Organisms use oxygen to break down glucose and generate energy in the form of ATP. This process occurs in most plants and animals.
The organ that takes in oxygen is the lungs. While in breathing process, oxygen passes through the lungs from the air by means of inhaling.
lung
ALL of the the organs in the human body need an oxygen supply. This even includes the organs responsible for delivering oxygen to the rest of the body: the heart and lungs. Every organ requires oxygen. All that can be said in this case is that some organs use/need more oxygen than others. For instance, the brain needs/uses more oxygen than the spleen.
Most cellular energy comes in the form of ATP which requires oxygen.
No, oxygen is not an organ at all. It's a gas. However, it is inhaled and exhaled through the respiratory system.
A semipermeable membrane is a large glucose molecule that requires facilitated diffusion but an oxygen molecule does not.