Living organisms require energy to perform different activities such as growing, moving and development. Do you know where this energy comes from? Living organisms get this energy through the process of respiration. In this lesson we will discuss the process of respiration.
First, what is the process of respiration?
The lungs and respiratory system allows to breathe. They bring oxygen into our bodies and send carbon dioxide out. This exchange of oxygen and carbon dioxide is called respiration.
Process of Respiration:
When we breath in, we inhale the oxygen present in the air. This air then passes through the nostrils. The dust particles are blocked from going any further by the hairs present in the nostrils. Then the air travels through the wind pipe also called the trachea, which filters the air inhaled further. The Trachea branches out two tubes called bronchi. Where the tiny hair called cilia move back and forth moving the mucus (mucus is a sticky substance that collects germs and particles that may damage the lungs) inside.
The bronchi carry air into each lung. The right lung has 3 lobes and the left lung has 2 lobes. The left lung is smaller than the right lung because it has to give space to the heart. These lobes are filled with small and spongy air sacs called alveoli, where the exchange of oxygen and carbon dioxide happens. It is the part where blood picks up oxygen and leaves carbon dioxide. Just below the lung there is an organ, called diaphragm, that contracts when we breathe in and expands when we breathe out. If respiration system wasn't present in the humans than no other system will function.
*Picture taken from google*
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