yes, oxygen in its elemental form is naturally corrosive and so might be harmful. although, the amount does not matter as much as the purity does. pure O2 would not let you live for too long. the oxygen used in hospitals is suitably mixed with other gases so that it does not harm the human body systems and at the same time provide pure healthy air
Oxygen makes up about 65% of the human body by mass.
A lot
Each human body has a different about of oxygen in it. A male weighing about 148 pounds has 65% oxygen.
65%
because without oxygen you cant breathe.
On average, the human body is composed of about 65% oxygen by mass, primarily in the form of water (H2O) and other organic molecules. This oxygen is essential for cellular respiration, which is the process by which cells generate energy.
The average adult human body contains about 3-4 grams of iron. It is an essential mineral that is important for the production of red blood cells and transporting oxygen in the body.
The human body needs approximately 550 liters of oxygen per day to sustain normal function. This oxygen is utilized in various physiological processes including respiration, metabolism, and energy production.
The brain only represents 2% of our total body weight. Interestingly, it consumes 25% of the body's oxygen.
The percentage of oxygen in inhaled air by humans is approximately 21%. This oxygen is then absorbed by the lungs and transported by the blood to the cells where it is used for energy production in the body.
The human body contains about 7-10 liters of hydrogen, mostly in the form of water. Hydrogen is a key component of many important molecules in the body, such as water and carbohydrates.
The oxygen demand for a human at rest is approximately 250-350 milliliters per minute. During exercise, this demand can increase significantly depending on the intensity of the activity.