Mechanism of Breathing: Breathing is a physical process that involves intercostal muscles which lies between the ribs and the diaphragm and helps in breathing.
Inhaling: During inhaling, the intercostals muscles contract, the ribs are pushed upward and outward and the diaphragm contracts and moves downward. This upward and outward movement of the ribs and the descending movement of the diaphragm add to the space in the chest cavity. This increases the volume of the air-tight chest cavity and creates pressure inside the lungs. Air rushes from outside through the trachea to the air sacs and alveoli.
Exhaling: During exhaling, the intercostals muscles relax and simultaneously two movements takes place, i.e., the ribs move downward and inward, the diaphragm relaxes and moves upward to take up its original position. The downward and inner movement of the diaphragm reduce the space in the chest cavity. The capacity of the chest becomes smaller and the air rushes out of the lungs. The lungs get vacant and then contracts. This happens because the exhaled air contains carbon dioxide and carbon dioxide turns lime water milky. Hence, this activity shows that we exhale carbon dioxide during breathing.
Take one mirror and exhale air from your mouth on a mirror. We see some moisture on the mirror. This shows that the exhaled air contains water vapours which condense on the mirror to form tiny water droplets
Exhaling is the downward and inner movement of the diaphragm reduce the space in the chest cavity. The capacity of the chest becomes smaller and the air rushes out of the ______________ . | |||
Right Option : A | |||
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Which of the following are correct ? (a) During Inspiration muscles attached to the ribs on their outer side contract. (b) During Expiration, muscles attached to the ribs on their inner side contract, and the diaphragm and the abdominal muscles relax . (c) During Inhaling movement of the diaphragm increases the volume of the air-tight chest cavity and creates pressure inside the lungs . | |||
Right Option : D | |||
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Expulsion of the air from the lungs is called ________________ . | |||
Right Option : C | |||
View Explanation |
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Abhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
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Abhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
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In terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
We started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
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Third consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...