(3)+Respiratory+system+structure

(1) Respiratory system structure Pasted from <[]> Nasal Cavity: Nasal Cavity and nose is in charge of breathing in respiratory system. When air is inhaled, the nasal cavity is divided into right and left passageway. The tissue covers the wall of nasal cavity that contains blood vessels and help warm the air inhaled. It makes moisture in the nose and air to not get nosebleeds.
 * Diagram with labels
 * Include a close up where required
 * Video embedded (if you can find a good one)

Picture of Nasal Cavity:

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Trachea (windpipe): The Trachea is a tube that connects to the larynx, lungs as well as the bronchus and bronchiole. It carries air towards parts of the respiratory system that it works with. It has C-shaped rings of cartilage to prevent the trachea from collapsing during inhalation.

Nostril: Nostril stands for either of two external openings of the nose. This is where the air is inhaled from your nose.

Pharynx: Part of digestive system that comes down to larynx and continues with esophagus.

Common channel for swallowing and respiration, the food and air pathways cross each other.

Larynx:

Larynx is an organ that connects the lower part of the pharynx with the trachea.





Function:


 * Valve to guard air passages
 * Swallowing
 * Maintenance of airway
 * Vocalization



Lung:

The lung is an organ that functions for us to live. It takes oxygen from breath taken, and removes carbon dioxide. The oxygen enters the lung's main pipe, the trachea which supplies to right and left lung. When the lung expands, the air pressure inside the lung drops, thus inhaling air from the outside. This is because the air must go to the low pressure zone which is in the lungs. The lung also functions as a defense against infection. The nose is first thing against inhaling harmful particles, then the lungs.

Pleura: Pleura is a thin membrane that surrounds the lung. The parietal pleura conceals the chest cavity and the visceral pleura covers up the lungs. The visceral pleura is when the parietal pleura folds back at the root of the lung. They protect the lungs from surrounding areas of the body and harmful particles. Pleura is made out of 2 layers, and fluid that takes up space between 2 layers. The two pleurae are always in contact. But, when air and liquid between the two pleurae are collected, the pleural cavity will become apparent. So, both in left and right, there are two pleural cavities. Pleural effusion happens when the blood cannot pump the fluid away from the lungs which can cause shortness of breaths.





Bronchus & Bronchiole:

They are the airway for lungs. The breath of air comes down to the bronchioles from mouth, larynx, trachea then to the bronchi. The major bronchi divides into smaller airways, which are called bronchioles. The exchange of oxygen and carbon dioxide occurs here.

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This is a video on youtube explaining and showing how the Respiratory system structure: []

Here is another video explain the Respiratory system in more details and explains why: []