Oxygen a free gift from nature- without human can not survive. An adult human breathes about 7 to 8 litres of air in a minute, while resting. That’s roughly 11 000 litres of air a day But sufficient oxygen available in our planet earth and large tree of 50 cm diameter and approximate height of 30-40 metres- This tree produces roughly 123 grams or 92 litres of pure oxygen a day, providing the average human with 14% of his or her daily requirement Air contain 20% of oxygen(only about a fifth of the atoms that make up our atmosphere are oxygen) if you are standing on sand, limestone, or even rust, you’re standing on oxygen atoms in various combinations Water is one oxygen atom combined with two hydrogen atoms into H2O. Water is eighty-nine percent oxygen by weight, and the surface of the planet has far more water than land

Oxygen use in our body

Approx 90% of energy is supported by Oxygen. Help us in maintaining Concentration & Strong Memory. Strengthen our heart creating less risk of heart attack. Promoting healing capacity and counters Aging. Stabilizes our Nervous System. Improves digestion and cell metabolism. Speed up our body recovery

When we breathe, or respire, oxygen from the air is taken up by blood in our lungs and soon delivered to each of the cells in our body through our circulatory system

Although oxygen dissolves in blood Only 1.5 percent of oxygen in the blood is dissolved directly into the blood itself. Most oxygen, 98.5 percent, is bound to a protein called hemoglobin and carried to the tissues.

Hypoxemia is a below-normal level of oxygen in your blood, specifically in the arteries. Hypoxemia is a sign of a problem related to breathing or circulation, and may result in various symptoms, such as shortness of breath. Hypoxemia is determined by measuring the oxygen level in a blood sample taken from an artery (arterial blood gas). It can also be estimated by measuring the oxygen saturation of your blood using a pulse oximeter — a small device that clips to your finger. Normal arterial oxygen is approximately 75 to 100 millimeters of mercury (mm Hg). Values under 60 mm Hg usually indicate the need for supplemental oxygen. Normal pulse oximeter readings usually range from 95 to 100 percent. Values under 90 percent are considered low.

Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells. Hemoglobin is made up of four subunits and can bind up to four oxygen molecules. Carbon dioxide levels, blood pH, body temperature, environmental factors, and diseases can all affect oxygen’s carrying capacity and delivery. A decrease in the oxygen-carrying ability of hemoglobin is observed with an increase in carbon dioxide and temperature, as well as a decrease in pH within the body. Sickle cell anemia and thalassemia are two hereditary diseases that decrease the blood’s oxygen-carrying capacity