i want to know what is the cause of lack of oxygen in blood.

wen u stop beathing

There can be more than one cause. There can be various disorders of the cardiopulmonary (heart-lung) system. Carbon monoxide (CO) poisoning is another. The CO bonds to the hemoglobin, blocking the O2 from attaching to the red blood cells.

Since this is not my area of expertise, I searched Google under the key words "Oxygen blood lack" to get these possible sources:

http://en.wikipedia.org/wiki/Blood
http://www.mayoclinic.com/health/hypoxemia/MY00219/DSECTION=causes
http://esciencenews.com/dictionary/lack.of.oxygen

You might also want to search under "hypoxia causes."

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

I hope this helps a little more. Thanks for asking.

The lack of oxygen in the blood, also known as hypoxemia, can be caused by various factors. To determine the specific cause, a medical professional would usually conduct a thorough evaluation. However, I can provide you with a general explanation of some common causes:

1. Respiratory Conditions: Lung diseases such as chronic obstructive pulmonary disease (COPD), asthma, pneumonia, and pulmonary embolism can impair the ability of the lungs to take in oxygen or exchange gases efficiently.

2. Cardiac Issues: Certain heart conditions, such as heart failure, can reduce the ability of the heart to pump oxygen-rich blood to the body, resulting in decreased blood oxygen levels.

3. Anemia: Anemia occurs when there is a deficiency of red blood cells or hemoglobin, which are responsible for carrying oxygen. This can be caused by inadequate iron intake, blood loss, or certain medical conditions.

4. Altitude: Oxygen levels decrease at higher altitudes, which can lead to altitude sickness and hypoxemia.

5. Sleep Disorders: Conditions like sleep apnea, where breathing pauses intermittently during sleep, can cause low oxygen levels in the blood.

6. Environmental Factors: Exposure to high levels of carbon monoxide (CO) or other chemicals that interfere with oxygen transport can result in hypoxemia.

It is important to note that this is not an exhaustive list, and the cause of hypoxemia may vary depending on individual circumstances. If you are experiencing symptoms or concerned about your oxygen levels, I recommend consulting a healthcare professional for a proper diagnosis and appropriate treatment.