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. The Nasal Cavity is situated above the mouth, and accesses the external atmosphere through the nostrils, and internally it accessed the pharynx with the internal nostrils. The nasal cavity helps filter out dust particles from the outside environment with the cilia and with mucus.
Pharynx:- From the nasal cavity, the air moves into the pharynx which is common area to both digestive and respiratory tracts.The pharynxopens into larynx or voice box through the glotis.The glotis can be covered by the leaf like cartilage epiglotis during swallowing of food.
The Larynx. The Larynx is a cartilagious structure located at the tracheal opening that resembles a box. When we swallow food, the larynx will move up or down to allow the passage of either air or food. The larynx also serves another purpose, as it contains two vocal chords to vibrate and produce sound, allowing us to speak.
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. Located in the thoracic cavity, there are two lungs, which is the last stop for air within the respiratory tract. Our lungs are a dark colored, spongy bag like structure that is incredibly elastic, allowing for them to expand and contact with each breath. The lungs rest on a sheet of muscle called the diaphragm. The diaphragm is one of the structures that surrounds the thoracic cavity, like the vertebral column and the sternum. The diaphragm forms the floor of the thoracic.
As mentioned before, the right lung is separated into three lobes, whereas the left long is only separated into two lobes. The lungs are also surrounded by a narrowly shaped pleural cavity, which is in turn surrounded by two membranes. These membranes secrete an oily substance called pleural fluid, which fills the Pleural cavity. - 15465
The Nasal Cavity. The Nasal Cavity is situated above the mouth, and accesses the external atmosphere through the nostrils, and internally it accessed the pharynx with the internal nostrils. The nasal cavity helps filter out dust particles from the outside environment with the cilia and with mucus.
Pharynx:- From the nasal cavity, the air moves into the pharynx which is common area to both digestive and respiratory tracts.The pharynxopens into larynx or voice box through the glotis.The glotis can be covered by the leaf like cartilage epiglotis during swallowing of food.
The Larynx. The Larynx is a cartilagious structure located at the tracheal opening that resembles a box. When we swallow food, the larynx will move up or down to allow the passage of either air or food. The larynx also serves another purpose, as it contains two vocal chords to vibrate and produce sound, allowing us to speak.
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. Located in the thoracic cavity, there are two lungs, which is the last stop for air within the respiratory tract. Our lungs are a dark colored, spongy bag like structure that is incredibly elastic, allowing for them to expand and contact with each breath. The lungs rest on a sheet of muscle called the diaphragm. The diaphragm is one of the structures that surrounds the thoracic cavity, like the vertebral column and the sternum. The diaphragm forms the floor of the thoracic.
As mentioned before, the right lung is separated into three lobes, whereas the left long is only separated into two lobes. The lungs are also surrounded by a narrowly shaped pleural cavity, which is in turn surrounded by two membranes. These membranes secrete an oily substance called pleural fluid, which fills the Pleural cavity. - 15465
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