CLASS - 3RD_NEW TRENDS IN SCIENCE_CHAPTER - 2. The Respiratory System

Added: 2026-05-25

[00:00:00][Music] the respiratory system breathing the process during which air rich and oxygen is taken in and air rich in water vapors and carbon dioxide is given out is known as breathing inhalation the process of taking in of air is known as inhalation [Music] exhalation the process of giving out of air is known as exhalation respiration [Music] the process of breaking down the complex food substances with the help of oxygen and releasing energy is known as respiration why do we respire as all machines need energy to work similarly our body also needs energy for its various activities this energy is obtained by respiration of food we eat the respiratory system the organs that help in respiration together form the respiratory system thus the various parts of respiratory system includes nose nasal passage windpipe and lungs [Music] what does one breath means one breath means one inhalation and one exhalation [Music] nose and nasal passage we breathe through nose or nostrils the nostrils contain hair these hair trap dust particles and germs and send clean air for respiration thus we should always breathe through our nose vent pipe the air from the nasal passage reaches the lungs through windpipe and then divides into two broad chi and then enter into the two lungs lungs lungs are the main respiratory organs in our body they are a pair of spongy elastic and bag like structures when we breathe in the lungs gets filled with fresh air this air is taken by blood to all parts of the body and the used air is then given back to lungs the air we inhale contains lot of oxygen which is taken by lungs in our body the percentage of oxygen decrees because our body takes oxygen for respiration and gives out carbon dioxide this gas is then given out of the body the breathing rate does not remain same under all conditions it increases after vigorous exercise and decreases when you are at rest air pollution the mixing of harmful components in air is known as air pollution air pollution effects our respiratory system and cause number of diseases the germs present in air enter into the respiratory tract and multiply causing various allergic diseases [Music] sneezing when we inhale the germs are trapped by the hills present inside the nose sometimes these particles are not trapped and cause irritation does sneezing occurs to throw these particles out [Music] cuffing if unwanted particles enter the respiratory tract then coughing occurs to throw these particles out estimate the breathing difficulty that occurs due to an allergic disorder is known as asthma precautions eating healthy food keeps our body healthy and prevents us from diseases common cold is a communicable disease thus keep a handkerchief in front of your nose while sneezing in case of severe cold visit a doctor how to ensure healthy breathing morning walk is very helpful because the air is clean and fresh Elfa breathing process increases the capacity of lungs people during yoga maintain good posture which helps to breathe properly too much of fatty foods reduce the capacity of breathing and in turn leads to obesity [Music] thus healthy food and good posture helps in healthy breathing when they breathe the size of chest increases during inhalation and it decreases during exhalation