what is function of lungs in the human body
Answers
Answer:
What do the lungs do?
The lungs' main function is to help oxygen from the air we breathe enter the red cells in the blood. Red blood cells then carry oxygen around the body to be used in the cells found in our body. The lungs also help the body to get rid of CO2 gas when we breathe out. There are a number of other jobs carried out by the lungs that include:
Changing the pH of blood (whether the blood is more acid or alkali) by increasing or decreasing the amount of CO2 in the body.
Filtering out small gas bubbles that may occur in the bloodstream.
Converting a chemical in the blood called angiotensin I to angiotensin II. These chemicals are important in the control of blood pressure.
How do the lungs and breathing work?
Breathing in is called inhalation. The most important muscle of inhalation is the diaphragm. Found beneath the lungs, the diaphragm is a dome-shaped muscle. When this muscle gets tighter (contracts), it flattens and the lungs increase in size. This sucks air down into your lungs.
Some of the oxygen in the air can then be transferred into your bloodstream. Some of the carbon dioxide in your blood is transferred into the air that is in your lungs. This controls the levels of oxygen and carbon dioxide in your bloodstream. See also the separate leaflet called The Heart and Blood Vessels for more information on how blood is pumped to the lungs and to the rest of your body.
Breathing out (exhalation) is the opposite of inhalation. The diaphragm and other chest muscles relax. This makes the lungs decrease in size so that air is pushed back out of your lungs and out through your mouth or nose.
The basic rhythm of breathing is controlled by the brain. Part of the brain called the brainstem has a special area dedicated to maintaining your breathing pattern. Nerve impulses from the brainstem control the contractions of your diaphragm and the other muscles of breathing. This is all done without thinking. However, other parts of the brain can temporarily overrule the brainstem. This is how we are able consciously to hold our breath or change our pattern of breathing.
While the brain controls the basic rhythm of breathing, it also receives information from sensors in the body. These sensors are nerve cells and provide information that influences the rate and depth of breathing. The main sensors monitor levels of CO2 in the blood.
When the level of CO2 rises, the sensors send electrical impulses to the brain. These impulses cause the brain to send more electrical signals to the muscles of breathing. Breathing then gets deeper and faster and more CO2 is breathed out (exhaled). The blood level of CO2 then decreases back to the normal level.
Answer:
The functions of lungs is to take oxygen from the atmosphere and give out carbon dioxide
Explanation:
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