Class 10 Science - Chapter Life Processes NCERT Solutions | How are the lungs designed in human bein
How are the lungs designed in human beings to maximise the area for exchange of gases?
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.
More Questions From Class 10 Science - Chapter Life Processes
- Q:-
Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?
- Q:-
How is the amount of urine produced regulated?
- Q:-
What criteria do we use to decide whether something is alive?
- Q:-
What are the different ways in which glucose is oxidised to provide energy in various organisms?
- Q:-
The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
(a) cytoplasm. (c) chloroplast.
(b) mitochondria. (d) nucleus. - Q:-
What are the differences between autotrophic nutrition and heterotrophic nutrition?
- Q:-
What are outside raw materials used for by an organism?
- Q:-
What would be the consequences of a deficiency of haemoglobin in our bodies?
- Q:-
What are the components of the transport system in highly organised plants?
- Q:-
What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
Popular Questions of Class 10 Science
- Q:-
Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.
- Q:-
What is a good source of energy?
- Q:-
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
- Q:-
What changes can you make in your habits to become more environment-friendly?
- Q:-
What is the difference between a reflex action and walking?
- Q:-
What is the importance of DNA copying in reproduction?
- Q:-
If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?
- Q:-
Why should a magnesium ribbon be cleared before burning in air?
- Q:-
Define the principal focus of a concave mirror.
- Q:-
You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
Recently Viewed Questions of Class 10 Science
- Q:-
Compare and contrast bio-mass and hydro electricity as sources of energy.
- Q:-
Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute H2SO4.
- Q:-
State Fleming’s left-hand rule.
- Q:-
Why do you think that there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?
- Q:-
Identify the substances that are oxidised and the substance that are reduced in the following reactions.
(i) 4Na(s) + O2(g) → 2Na2O(s)
(ii) CuO(s) + H2(g) → Cu(s) + H2O(l) - Q:-
Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics?
- Q:-
Compute the heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V.
- Q:-
What is ozone and how does it affect any ecosystem?
- Q:-
What are the functions performed by the testis in human beings?
- Q:-
What is a neutralisation reaction? Give two examples.
- All Chapters Of Class 10 Science
- All Subjects Of Class 10