If not, if the oxygen level fell, at what percentage would it cease to sustain human life?
2007-04-24 05:18:07 · 5 answers · asked by Calvin James Hammer 6 in Science & Mathematics ➔ Biology
our muscles can respire anaerobically which is what is happening when we get a cramp
Glucose ---> Lactic acid + Energy (ATP)
C6H12O6 ---> 2C3H6O3 + 2 ATP
2007-04-24 05:39:02 · answer #1 · answered by Hzl 4 · 0⤊ 0⤋
We can only use oxygen for respiration. The oxygen level in air at sea level is about 20%, the rest is nitrogen and minute traces of various other gases. If you lower the percentage of oxygen in air the breathing would have to be more rapid to supply your lungs with sufficient oxygen. At a level of 10% you would most likely be already very stressed and panting rapidly. People living at very high altitudes will be able to survive in lower levels of "O" than most of us. It is against the law to make an experiment to be able to give you an accurate answer to your question!
2007-04-24 05:42:17 · answer #2 · answered by Ziggy 2 · 0⤊ 1⤋
The circulatory system is made up of the vessels and the muscles that help and control the flow of the blood around the body. This process is called circulation. The main parts of the system are the heart, arteries, capillaries and veins. As blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta. The aorta is the largest artery in the body. The blood leaving the aorta is full of oxygen. This is important for the cells in the brain and the body to do their work. The oxygen rich blood travels throughout the body in its system of arteries into the smallest arterioles. On its way back to the heart, the blood travels through a system of veins. As it reaches the lungs, the carbon dioxide (a waste product) is removed from the blood and replace with fresh oxygen that we have inhaled through the lungs.
2016-05-17 21:25:30 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Its actually a mix between Oxygen and Carbon dioxide, If we were to breathe pure oxygen we would get light headed. Why do you think mouth to mouth resuscitation works, If we expel only CO2 and we breath only O2 that wouldnt work at all.
I read we draw in 21% O2 so I would think any less would be deadly.
2007-04-24 05:24:24 · answer #4 · answered by ZorEl 2 · 0⤊ 1⤋
19% is the minimum, less than that will be fatal
2007-04-24 05:36:25 · answer #5 · answered by millet_0220 4 · 0⤊ 1⤋