The human body can go without oxygen for about four minutes before brain cell death begins to occur. If oxygen is not restored in as little as four minutes, the brain may suffer permanent injury or anoxic brain damage, which can lead to many serious health issues.
Anoxic brain damage can lead to a coma or cause an individual to experience confusion, headaches, poor coordination, seizures and many other health issues. Health issues and accidents, such as drowning, choking, heart attacks, drug use, electrical shock and carbon monoxide poisoning, can increase the likelihood of developing anoxic brain damage. Tests, such as MRI's, CT scans and SPECT scans, can be performed by doctors, to determine the level of brain damage in an individual.Learn More
The main function of the heart is to pump blood to the lungs to be saturated with oxygen, and then pump it out into the body to supply the cells with oxygen. The heart, along with the blood vessels, make up the cardiovascular system.Full Answer >
The respiratory system supplies the body with oxygen, which provides energy to the cells. Another important function of the respiratory system is to remove carbon dioxide from the blood stream.Full Answer >
Bronchioles are tiny airways that carry oxygen to alveoli, or air sacs, in the lungs and help stabilize breathing in the respiratory system, according to About.com. Bronchioles are lined with smooth muscular walls that constrict or expand to regulate airflow and prevent irritants from passing further along the respiratory tract.Full Answer >
The respiratory system's structured pathways enable breathing by carrying oxygen to the lungs and filtering out harmful substances, explains WebMD. Respiratory organs also expel carbon dioxide from the body and transport oxygen to the bloodstream so it can be delivered to the cardiac system and cell tissue.Full Answer >