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 cavaty:- Nasal cavity lies above the mouth cavity. Tye nasal cavity communicate to the outside through external nostrils and internally with the pharynx by internal nostrils. Both cilia and mucus check the entry of dust particles in the respiratory passage.
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.
Trachea:- Larynx is followed by trachea.It is tube about eleven centimeter in length and twenty five centimeter in diameter. Its wall is provided with incomplete C-shape cartiligious ring which keep the trachea in dilated position and prevent it from collapsing.
The Bronchi and Bronchioles. The next stop for air is the two primary bronchi that split off from the trachea. These serve the function of carrying the air into the next organ, the lungs. The right bronchus divides into three bronchi, each extending respectively into the three lobes of the right lung. On the other side, the left bronchi divides into two bronchi that extend into the two lobes of the 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. - 15790
The nasal cavaty:- Nasal cavity lies above the mouth cavity. Tye nasal cavity communicate to the outside through external nostrils and internally with the pharynx by internal nostrils. Both cilia and mucus check the entry of dust particles in the respiratory passage.
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.
Trachea:- Larynx is followed by trachea.It is tube about eleven centimeter in length and twenty five centimeter in diameter. Its wall is provided with incomplete C-shape cartiligious ring which keep the trachea in dilated position and prevent it from collapsing.
The Bronchi and Bronchioles. The next stop for air is the two primary bronchi that split off from the trachea. These serve the function of carrying the air into the next organ, the lungs. The right bronchus divides into three bronchi, each extending respectively into the three lobes of the right lung. On the other side, the left bronchi divides into two bronchi that extend into the two lobes of the 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. - 15790
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