SELECT * FROM question_mgmt as q WHERE id=3639 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=257 and ex_no='3' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Life Processes how are the lungs designed in human beings to maxi

Question:

How are the lungs designed in human beings to maximise the area for exchange of gases?

Answer:

Lungs are the two pairs of organ lies in the thoracic cavity on the sides of the heart. The trachea divides into two tubes- major or primary bronchi. Major bronchus enters the right lung and second one enter into the left lung. Then bronchus divides into secondary bronchi further extends into three lobes of right lung and subdivides into small tertiary bronchi and finally they divided into smaller bronchioles (wall consists of epithelium). Then, these terminal bronchioles divided into alveolar ducts enters into alveolar sacs. This respiratory pathway within the lungs are known as respiratory tree.

Alveoli are pouch like structure present on the each nerve ending and possess network of blood capillaries or covers very huge amount of surface of the human body, which increases the surface area for the exchange of gases. That is how, the lungs are designed in human beings to maximise the area for exchange of gases- uptake of oxygen by blood and release of carbon dioxide by blood.


< Previous Question

Next Question >

SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='9' AND subId='16' AND ex_no!=0 AND status=1 and id!=3639 ORDER BY views desc, last_viewed_on desc limit 0,10

  • Popular questions of class 10 Science

SELECT ex_no,question,question_no,id,chapter FROM question_mgmt as q WHERE courseId='9' AND subId='16' AND ex_no!=0 AND status=1 and id!=3639 ORDER BY last_viewed_on desc limit 0,10

  • Recently Viewed Questions of Class 10 Science

Comments

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

  • Answered by Ekta Mehta
  • 4 months ago

Taking Screenshots on your Samsung Galaxy M31s is very easy and quick.

Comment(s) on this Question


NCERT Solutions

Quick Links

Resources

Support