Respiratory System
Channel: Kirish Views
Date: 2020-11-22

INTRO TO RESPIRATORY SYSTEM : 
We have to breathe all the time to stay alive.
When we breathe, our lungs absorb oxygen from the air and pass CO2 out into the air.
RESPIRATION:
Respiration is a much more complex process.
It involves breathing and oxidation of digested food occurring in the cells in order to release energy.
Energy is needed by our body to perform various day to day physical and metabolic activities.
TYPES OF RESPIRATION:
Aerobic respiration:
It is the process of breakdown of glucose in the presence of oxygen.
Glucose is completely oxidised.
Energy released is more.
Anaerobic respiration:
It is the process of breakdown of glucose in the absence of oxygen.
Glucose is incompletely oxidised.
Energy released is less.
HOW DOES THE RESPIRATORY SYSTEM WORK ?
Air passes through the nostrils, then travelthrough the windpipe also known as trachea.
Hairs in nostrils filter the inhaled air.
The trachea branches out into two tubes called bronchi.
Bronchi contains tiny hairs called Cilia , which move back and forth moving the mucus inside.
Cilia collects germs and other particles.
Mucus is a sticky substance.
Air passes through the bronchi into the lungs.
Right lung has 3 lobes and left lung has 2 lobes.
Left is slightly smaller is size to give space to the heart.
These lobes are filled with small and spongy air sacs called alveoli.
Alveoli exchanges oxygen for Co2 with blood in the capillaries.
Just beneath the lungs there is a dome shaped muscle  called diaphragm.
Diaphragm contracts when we inhale and relaxes when we exhale.
It also seperates chest cavity from the abdominal cavity .
ROLE OF BLOOD DURING GASEOUS EXCHANGE:
One of the most important function of the blood is to transport oxygen to different organs of the body and collect Co2 from them.
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