Biology
With regard to the respiratory system and the process of respiration in man, answer the following questions:
(a) Name the two muscles that help in breathing.
(b) Briefly describe how the above mentioned muscles help in the inspiration of air.
Respiratory System
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Answer
(a) The two muscles that help in breathing are — intercostal muscles and abdominal muscles.
(b) When the intercostal muscles stretch between the ribs, they move outwards and inwards causing them to enlarge the chest cavity.
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