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
5 Likes
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.
Answered By
3 Likes
Related Questions
Correct the following statements by changing the first/ last word only :
- BCG is a kind of vaccine used to prevent Pneumonia.
- Streptomycin is a kind of vaccine.
- Breathing is a bio-chemical process.
- The amount of oxygen in expired air is 21%.
- The front opening of the trachea is guarded by a muscular flap called diaphragm.
Describe in brief the function of ribs and diaphragm in breathing.
Fill in the blanks with suitable words :
- The …………… emerges from the larynx down below in the neck.
- The inner lining of trachea consists of …………… epithelium.
- …………… end up into microscopic alveoli.
- The volume of chest cavity …………… during inspiration.
- The amount of …………… gas remains the same in the inspired air and expired air.
The diagram given alongside shows the "Human Respiratory System". Study the same and answer the following questions :
(i) Label the guidelines 1 to 4.
(ii) Define the structure shown as part 2.
(iii) Name the basic structural and functional unit of part 3.
(iv) Write one specific structural feature of the inner lining of part 1.
(v) What is the muscular sheet on which part 3 rests ?