About 20%.
You have low concentration of oxygen in the veins. It is low in right side of the heart. It is supposed to be the lowest before it enters the alveoli of the lungs.
Because oxygen is used to burn glucose, the fuel preferred by the brain. At rest, you use about 20% of the oxygen you breathe to keep your brain running.
The function of the respiratory system is to provide the body with oxygen. Oxygen enters the body through the respiratory system and is carried in blood throughout the body.
4-6 liters of blood is in the human body, depending upon your size. It all, eventually, flows through your brain and everywhere you have blood vessels throughout your body.
Osmosis. The Oxygen is breathed into the lungs and the arteries that run beside and below the lungs absorb the oxygen and carry it threwout the body.
25% of oxygen goes to your brain
The brain consumes 40% of the oxygen in your blood.
Oxygen enters via the lungs.
Oxygen rich air enters the body through the lungs.
Carbon is dangerous as it is enters the body and stays in the hemoglobin. Carbon in the hemoglobin will cause limited oxygen in the blood and into the brain.
You have low concentration of oxygen in the veins. It is low in right side of the heart. It is supposed to be the lowest before it enters the alveoli of the lungs.
oxygen
Oxygen enters via the lungs.
your nose
Because oxygen is used to burn glucose, the fuel preferred by the brain. At rest, you use about 20% of the oxygen you breathe to keep your brain running.
Through your mouth and nose
Air, oxygen