(3)+Respiratory+system+structure




 * The Respiratory System:**

Our respiratory system is made up of 6 major parts, starting with the nasal passage which connects to the pharynx, which links to the larynx which is right above the trachea or windpipe, then comes the bronchi and lungs. Our respiratory system is responsible for yep, you got it, respiration, responsible for taking in oxygen while exhaling Carbon Dioxide as the produce of a chemical reaction in the cells. The system of the Human Respiratory is composed of two main areas, the upper respiratory tract that includes the nasal passages, pharynx and the larynx and the lower respiratory tract that is includes the trachea, the primary bronchi and the lungs.

**The Nasal passages:** The oxygen entering from the nose leads to the nasal passages. Placed behind the nose, the nasal cavity is responsible for preparing the air that comes through the nostrils. The process of preparing the oxygen includes warming or cooling the oxygen, removing the dust particles from the air and also moistening it, before entering the pharynx.

**Pharynx:** Located behind the nasal cavity and above the larynx, the Pharynx is also part of the digestive system in the human body. Food as well as air passes through the pharynx. The pharynx separates food and air to ingest.

**Larynx:** Associated with producing sound, consisting of two pairs of membranes, the oxygen causes the vocal cords to vibrate, which is how sound is produced. Placed at the neck of humans it the larynx plays a major role in the protection of the trachea. (see below) Larynx is also responsible to act like a valve to guard air passages, swallowing and maintenance of airway.

**Trachea**: Trachea references to the airway where respiratory air travels through. There are also rings of cartilage( a sort or connective tissue that is found in almost all joints, it is less rigid than bone but, not as flexible as muscle) inside its walls to always keep the trachea open.

**Bronchi:** The trachea divided into two main bronchi that extends into the lungs spreading as if roots as bronchial tubes. The bronchial tubes split and split again as their walls get smaller, creating bronchioles that have small air chambers, which contain cavities called alve oli. Alve oli having small thin walls form the respiratory surface.  **Lungs**: The most commonly known part of the respiratory system, the lungs are the most important part of the human respiratory system. Located on the two sides of the heart, the lungs are responsible for carrying oxygen from the nose into our red blood cells and then the oxygen then releases carbon dioxide from the blood cells out through the nose to the surrounding atmosphere.

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"Buzzle." //Respiratory System//. N.p., n.d. Web. 27 Oct. 2011. .

(1) Respiratory system structure
 * Diagram with labels
 * Include a close up where required
 * Video embedded (if you can find a good one)

Work Cited: "The LUNGS." Chart. HUMAN RESPIRATION. N.p., n.d. Web. 1 Nov. 2011. <[] 00%20Human%20Other%20Systems--WHOLE.htm>.