Respiratory Organ In Human Being
In order for human beings to survive, we have to breathe, and so we have the respiratory tract, which is the passage that air travels along from the outside to our lungs. The respiratory system consists of the respiratory tract and respiratory organs, and is known as pulmonary respiration. In humans, the respiratory tract is a complex system, made up of six key organs.
The Nasal Cavity: A part of our nose, the nasal cavity brings in air through the external nostrils, and then sends it to the pharynx with our internal nostrils. The nasal cavity also serves the function of sifting out dust particles with mucus and the cilia as a barrier.
The Pharynx: The pharynx is the next stop for air after the nasal cavity. The glottis is the mechanism by which the pharynx opens into the larynx or voice box. The glottis also serves another important purpose. Because the digestive and respiratory tract both share the pharynx, the glottis is covered by the leaf like cartilage epiglottis when we swallow food, which prevents food getting into the respiratory system.
The Larynx: This is a cartilagious, box-like structure that is situated at the tracheal opening. The larynx will move up or down when we swallow to allow the passage of air or food, safely. It also is responsible for human speech, as it contains two vocal chords that vibrate to produce sound.
The Trachea. After the larynx, thereas the trachea, which is a tube leading to the bronchi. This tube is eleven centimeters in length and twenty five in diameter. The trachea has an incomplete C-shape cartiligious ring within its wall, which prevents it from collapsing so we can keep breathing.
Bronchi and Bronchioles:- At its lower end, the trachea splits into two primary bronchi.The right bronchus is divided in three bronchi which extend seperatly into the three lobies of right lung.Similarly the left bronchi is divided into two bronchi penetrating into the two lobies of left lung.
The Lungs: Lungs are an elastic, spongy, bag like structure, that is hollow. There are two lungs, both located in the thoracic cavity. The thoracic cavity is surrounded by the vertebral column, the sternum, and the diaphragm. The diaphragm form the floor of the cavity, so they are what our lungs rest on.
The lungs are probably one of the most complex organs in the respiratory tract, with the right lung divided into three lobes and the left lung divided into two. The lungs are enclosed by the pleural cavity, which is itself surrounded by two membranes that secrete an oily matter called pleural fluid, which permeates the Pleural cavity.
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