Question

explain human respiratory system ( in points not in paragraph)( class 10)​

Answer 1

Explanation:

“Human Respiratory System is the organ system that involves inhaling of oxygen and exhaling of carbon dioxide to meet the energy requirements.” When we breathe, we inhale oxygen and exhale carbon dioxide. The so-called exchange of gases is necessary for metabolic activities and can be considered a chemical process

Answer 2

Answer:

• Human Respiratory System is the organ system that involves inhaling of oxygen and exhaling of carbon dioxide to meet the energy requirements.
• The human respiratory system consists of a group of organs and tissues that help us to breathe.
• Lungs are the primary organs of the respiratory system which help in the exchange of gases. The other main parts of this system include a series of airways for air passages, blood vessels, and the muscles that facilitate breathing.
• nasal cavity →  pharynx → larynx → epiglottis → trachea → bronchi → lungs → alveoli→ heart
• The respiratory tract in humans is made up of the following parts:

1. External nostrils :- For the intake of air.
2. Nasal chamber :- which is lined with hair and mucus to filter the air and remove dust and dirt.
3. Pharynx :- It is a passage behind the nasal chamber and serves as     the common passageway for both air and food.
4. Larynx :- Also known as the soundbox as it helps in the generation of sound and thus helps us in communicating.
5. Epiglottis:- It is a flap-like structure that covers the glottis and prevents the entry of food into the windpipe.
6. Trachea :- It is a long tube passing through the mid-thoracic cavity.
7. Bronchi :-The trachea divides into left and right bronchi.  Each bronchus is further  divided into finer channels known as bronchioles .
8. Alveoli:-The bronchioles end up into the balloon-like structures known as the alveoli .
9. Lungs :-We have a pair of lungs, which are sac-like structures and covered by a double-layered membrane known as pleura.

• The air that we inhale has the following composition:

             Nitrogen – 78%

             Oxygen – 21%

             Carbon dioxide – 0.03 – 0.04%

             Traces of Hydrogen and Noble gases

• The energy is generated by the breakdown of glucose molecules in all living cells of the human body.

• Oxygen is inhaled and is transported to various parts and are used in the process of burning food particles (breaking down of glucose molecules) at the cellular level in a series of chemical reactions.
• The obtained glucose molecules are used for discharging energy in the form of ATP- adenosine triphosphate molecules by the human body to fulfil essential life processes.