Explaining Writing: The Respiratory System

Room 12B are learning about the body. Everyone got a topic to work on. The one that I got was the respiratory system. For writing we were learning to explain what the topic is clearly. Here is my writing:

The Respiratory System

The respiratory system is a complicated name for the breathing system. Parts of the body involved in the respiratory system are the mouth, nose, pharynx, larynx, trachea, bronchi and lungs. Each of these are systems but are joined together because of what they do. They all connect and make a valuable point. They all help the body breathe.

The Mouth and Nose

The mouth is a double passage way it collects oxygen and also lets out the carbon dioxide . Your nose is a two-way street; it gathers oxygen and also lets the carbon dioxide out and then it connects with the back of the throat. The nasal cavity is separated from the inside of your mouth by the palate. When you inhale air through your nostrils, the air goes into the nasal passages and enters into your nasal cavity. The air then goes down the back of your throat into the trachea and where air comes in it has to go out.

Pharynx

The pharynx (commonly known as the throat) is a sort of funnel. The pharynx has 3 different parts ‘called’: the nasopharynx, oropharynx, and laryngopharynx. The nasopharynx is the region of the pharynx found in the nasal cavity. Air from the nasal cavity passes into the nasopharynx and goes down through the oropharynx. Air goes through the back cavity and then the pharynx at the oropharynx. The air then goes into the laryngopharynx, where it is changed into the opening of the larynx by the flap. The flap is an elastic whitish tissue that is basically a switch between the trachea and the esophagus.

Larynx

The larynx (voice box) contains vocal folds which allow the body to make the sounds of speech, singing, talking and humming. The vocal folds are folds of mucous membrane that vibrate to make noise. The tightness and vibrations speed of the vocal folds can be changed. The cords are changed to change the pitch that they are making letting sounds out that can go higher and lower.

The Trachea

Next, air travels up and down the trachea (windpipe). It then splits when it reaches the lungs. The trachea first starts in your neck where it receives the oxygen from the mouth and the nose then transmits the air down the windpipe.

The Bronchi

The trachea divides into a right and left main bronchus. Each major bronchus then divides again into smaller airway passages referred to as bronchi. As the airway passages make their way out to the lung tissue, the passages become smaller and are known mostly as bronchioles. Eventually the bronchioles stop into small collections of air sacs known as alveoli, which is where the actual exchange of carbon dioxide and oxygen occur.

The Lungs

The lungs are the biggest organs for the breathing system. When we breathe in oxygen is taken into the body and when exhaling carbon dioxide is expelled from the body and carbon dioxide is breathed out. What the lungs do is take a gas that your body needs to get rid of which is carbon dioxide and exchange it for a gas that your body can use which is oxygen.

Summary

Air goes into the lungs and nose which flows through the pharynx and larynx. The air then goes down the trachea and splits left and right once reaching the bronchi. After the air reaches the air sacs it continues into the lungs. When the air reaches the lungs the carbon dioxide moves out and comes out of your mouth and nose.