write function of respiratory system and its working
Answers
Respiratory Tract
Functions
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.
Every organism, from an individual bacterial cell to a mighty blue whale, undergoes respiration. This respiration is carried out by a system of organs known as the Respiratory System and the respiration in humans is carried out by the human respiratory system.
Let us explore respiratory system notes to have a detailed understanding of the human respiratory system, its parts, functions and the process of respiration in humans.
Respiratory System Definition
“Human Respiratory System is the organ system that involves inhaling of oxygen and exhaling of carbon dioxide to meet the energy requirements.”
What is the Respiratory System?
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.
Also Read: Mechanism of Breathing
Human Respiratory System Diagram
The diagram of the human respiratory system shows different parts involved in the exchange of gases.

Human Respiratory System Diagram showing different parts of the Respiratory Tract
Features of the Human Respiratory System
The respiratory system in humans has the following important features.
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.
Also Read: Difference between trachea and esophagus
Respiratory System Parts and Functions
Let us have a detailed look at the different parts of the respiratory system and their
What is the human respiratory system?
The human respiratory system is a system of organs responsible for inhaling oxygen and exhaling carbon dioxide in humans. The important respiratory organs in living beings include- lungs, gills, trachea, and skin.
What are the important respiratory system parts in humans?
The important human respiratory system parts include- Nose, larynx, pharynx, trachea, bronchi and lungs.
What is the respiratory tract made up of?
The respiratory tract is made up of nostril, nasal chamber, larynx, pharynx, epiglottis, trachea, bronchioles, bronchi, alveoli, and lungs.
What are the main functions of the respiratory system?
The important functions of the respiratory system include- inhalation and exhalation of gases, exchange of gases between bloodstream and lungs, the gaseous exchange between bloodstream and body tissues, olfaction and vibration of vocal cords.
What are the different types of respiration in humans?
The different types of respiration in humans include- internal respiration, external respiration and cellular respiration. Internal respiration includes the exchange of gases between blood and cells, external respiration is the breathing process, whereas cellular respiration is the metabolic reactions taking place in the cells to produce energy.
What are the different stages of aerobic respiration?
Aerobic respiration is the process of breaking down glucose to produce energy. It occurs in the following different stages- glycolysis, pyruvate oxidation, citric acid cycle or Krebs cycle, and electron transport system.
Why do the cells need oxygen?
Our body cells require oxygen to release energy. The oxygen inhaled during respiration is used to breakdown the food to release energy.
What is the main difference between breathing and respiration in humans?
Breathing is the physical process of inhaling oxygen and exhaling carbon dioxide in and out of our lungs. On the contrary, respiration is the chemical process where oxygen is utilized to breakdown glucose to generate energy to carry out different cellular processes.
Explanation:
Your respiratory system is the network of organs and tissues that help you breathe. This system helps your body absorb oxygen from the air so your organs can work. It also cleans waste gases, such as carbon dioxide, from your blood. Common problems include allergies, diseases or infections