It depends on how long you hold your breath.
What you have to do is to swallow a big gulp of air.
Answer
No it doesn't, but a good way of curing hiccups is to get a cup of water and drink all or as much as you can, without taking a breath. Works everytime!
When someone is holding their breath, oxygen levels decrease. Heart rate will then increase to try to keep the oxygen flowing.
If you held your breath, the carbon dioxide levels in your body would rise making it harder and harder for you to maintain holding your breath.
You are preventing oxygen from getting to your lungs.
Lack of oxygen to the brain.
Yes you will pass out before you die from holding your breath. Your brain wont be getting oxygen so it will temporarily shut down but when you pass out you will begin to breath again.
Holding your breath for a long period of time is dangerous because, you may pass out because your brain shuts down from the lack of oxygen.
the body feels a lack of oxygen. It also feels a buildup of CO2 .
Plants started to grow on the earth, plants breath in carbon dioxide (which is why it decreased so much) and they breath out oxygen. That is why the percentage of oxygen has increased so much.
If you held your breath, the concentration of oxygen in your lungs would decrease. The concentration of carbon dioxide would increase in your lungs.
Holding your breath depends on oxygen in your system. After breathing in a bag, you've been depriving yourself of oxygen (breathing in what you breath out - carbon dioxide) and so you're oxygen starved.
When you hold your breath, CO2 levels will increase in your body, which, simply put, makes your body oxygen-starved. This, then, will trigger a reaction that will attempt to get as much oxygen throughout the body as possible, and this is done by increasing the heart rate.
When you breath you inhale oxygen and other earth gases when you exhale most of that oxygen has been diffused to CO2. The quicker you breath the less time the alveoli in your lungs have time to diffuse he oxygen. When breathing just right the ratio would be just right. Holding your breath doesn't count because you are just holding CO2. The reason it is important to breathe right while you jog is so your lungs can pull in oxygen to the blood stream and distribute it to the body.