2. Introduction  Hello, we are Esteban Trejo, McKenzee Simpson, and Saleen Y. Griffin. We will be talking about the Respiratory System. We will talk about all the major functions and we will also talk about extra information about the Respiratory System.  There are three main functions, and the first is to supply the body with O 2 and disposes of CO 2.  The second is to house olfactory (smell) receptors.  Last but not least, the third function is to provide sound and speech making organs and tissues.

3. Here are the steps to how the Respiratory System works :  You breath in from your mouth or nose.  It enters the Trachea. ( a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe)  Then from the Trachea leads from Pharynx to your lungs  Then it goes into the Bronchus. ( any of the major air passages of the lungs that diverge from the windpipe )  Then into the lungs.  Last your Bronchioles. ( any of the minute branches into which a bronchus divides )  Finally into our Aveoli. ( any of the many tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place )

5. Here is a video of the passage way of air.  ► 2:35► 2:35 ► 2:35► 2:35 www.youtube.com/watch?v=zyUeAJumb5w

6. Circulatory System- The lungs is where the body is able to engage in gas exchange between the blood and air. The circulatory system deoxygenated blood to the lungs, where it is again oxygenated and returned to the heart, so it can be pumped to tissues and organs. Nerve System- Various sensors and receptors in the lungs are sensitive to inflation, deflation, and chemical stimulation, and can activate the Nervous System. Afferent signals sent from the Respiratory System initiate neurally- controlled responses such as cough reflex or changes in the breathing pattern. Immune System- Foreign particles and cells in the Respiratory System stimulate the Immune System to release macrophages lymphocytes as protection. Asthma is a complex inflammatory disease resulting from a mistaken immune response.

7. 1. 300 million alveoli ( an air cell of the lungs, formed by the terminal dilation of tiny air passageways ) may be found in a pair of human lungs. 2. Approximately 1500 miles of airway are present in human lungs. 3. An average person breathes about 13 pints of air every minute. 4. In human beings, the right lung is bigger than the left for accommodating heart. 5. We often see people yawning, right? That’s because the brain detects low oxygen levels in the lungs and it triggers back the response to the body so it can take in large amounts of oxygen.

8. That was our presentation on the Respiratory System. We hoped you like it and learned something new. Thank you for your cooperation in being quiet. Any Questions?