Biology
What are the functions of the following in breathing?
Ribs
Respiratory System
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Answer
The ribs move upwards and outwards due to the contraction of the external intercostal muscles stretched between them thus enlarging the chest cavity all around. (The internal intercostal muscles are relaxed).
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Related Questions
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.
(c) Give the overall chemical equation to represent the process of respiration in humans.
(d) What is meant by:
- Residual air
- Dead air space
Starting from the nostrils, trace the path in sequence which the transpired air takes until it reaches the air sacs.
What are the functions of the following in breathing?
DiaphragmWhat are the functions of the following in breathing?
Abdominal muscles