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Follow an OXYGEN MOLECULE through the Human Respiratory System Hi I am O2 ,you can call me oxygen, and I will be your guide today. I advise you keep all feet and hands inside the ride at all times. Oxygen Cell You may be asking, what is the Respiratory system? Well, the Respiratory system is the system that helps you breath in and out, so oxygen (02) can be pumped through your body and carbon dioxide (CO2) can be removed from the blood stream. You must remember that the Respiratory system is made up of many different organs. Respiratory Intro JH Nasal Passage Where are we? Tongue Here We Go!!! Pharynx Bronchi Tubes Alveoli (air-sacs) Thin-walled blood vessels called capillaries The Trachea is held open by partial rings of cartilage. Bronchioles pass air to and from your alveoli. Very thin cells line the alveoli so that O2 and CO2 can pass in and out of the blood. JH Picture Intro Here is a overview picture of the Respiratory System. Just go to the next slide to see it. MB Respiratory Overview Picture Nasal Cavity Throat Nose (pharynx) Mouth Bronchus Bronchiole Alveolus Diaphragm Windpipe (Trachea) Left lungs Ribs The Nose and Mouth This is where it all begins. This is where the oxygen first enters your body and also where Carbon Dioxide leaves. MB The Nose and Mouth When the air comes into your nose it gets filtered by tiny hairs and it is moistened by the mucus that is in your nose. Your sinuses also help out with your Respiratory System. They help to moisten and heat the air that you breath. Air can also get into your body through your mouth/oral cavity but air is not filtered as much when it enters in through your mouth. Nose and Mouth Picture Nasal Cavity Nostril Oral Cavity Pharynx Here is a picture of your nasal and oral cavity. MB Where are We? Nasal Passage We are here. Tongue Pharynx Bronchi Tubes Alveoli (air-sacs) Thin-walled blood vessels called capillaries The Trachea is held open by partial rings of cartilage. Bronchioles pass air to and from your alveoli. Very thin cells line the alveoli so that O2 and CO2 can pass in and out of the blood. The Pharynx and Trachea Next we will head down to your pharynx (throat) and your trachea (windpipe). This is where the air passes from your nose to your bronchi tubes and lungs. MB The Pharynx and Trachea Mouth Pharynx (Throat) Trachea Your pharynx (throat) gathers air after it passes through your nose and then the air is passed down to your trachea (windpipe). Your trachea is held open by “incomplete rings of cartilage.” Without these rings your trachea might close off and air would not be able to get to and from your lungs. MB Where are We? Nasal Passage Tongue Pharynx We are here. Bronchi Tubes Alveoli (air-sacs) Thin-walled blood vessels called capillaries MB The Trachea is held open by partial rings of cartilage. Bronchioles pass air to and from your alveoli. Very thin cells line the alveoli so that O2 and CO2 can pass in and out of the blood. The Bronchi Tubes and Bronchiole Intro Your trachea (windpipe) splits up into two bronchi tubes. These two tubes keep splitting up and form your bronchiole. The Bronchi Tubes and Bronchiole These bronchi tubes split up, like tree branches, and get smaller and smaller inside your lungs. The air flows past your bronchi tubes and into your bronchiole. These tubes keep getting smaller and smaller until they finally end with small air sacs (called alveoli). But we will go there later… MB Alveoli and Bronchi Picture Trachea Bronchi Tubes Bronchiole Alveoli MB Where are We? Nasal Passage Tongue Pharynx Bronchi Tubes Alveoli (air-sacs) Thin-walled blood vessels are here. called We capillaries The Trachea is held open by partial rings of cartilage. Bronchioles pass air to and from your alveoli. Very thin cells line the alveoli so that O2 and CO2 can pass in and out of the blood. The Alveoli and Capillary Network Now we will head over to the alveoli and what happens when the air finally makes it down there. MB The Alveoli and Capillary Network Your alveoli are tiny air sacs that fill up with air/oxygen when you breath in. Your alveoli are surrounded by many tiny blood vessels called capillaries. The walls of your alveoli (and capillaries) are so thin that the oxygen or carbon dioxide can pass through them, traveling right into, or out of your blood stream. Alveoli Picture Here is a close up picture of your Alveoli and a Capillary surrounding it. Capillary Wall of the air sac Carbon Dioxide is dropped off Oxygen is picked up Red Blood Cell MB Nasal Passage Where are We? Tongue Pharynx Bronchi Tubes Alveoli (air-sacs) Thin-walled blood vessels called capillaries We are here. The Trachea is held open by partial rings of cartilage. Bronchioles pass air to and from your alveoli. Very thin cells line the alveoli so that O2 and CO2 can pass in and out of the blood.