1. Respiratory System Period 3 Ana, Maya, Carter

2. System Function The primary function is to supply oxygen to the blood cells throughout the body. The body does this through breathing, inhaling oxygen and exhaling carbon dioxide.

3. The Nasal Passage & The Oral Cavity The function of the nasal cavity is to warm, moisturize, and filter air entering the body before it reaches the lungs. Hairs and mucus lining the nasal cavity help to trap dust, mold, pollen and other environmental contaminants before they can reach the inner portions of the body.

4. The Lungs The lungs' main function is to help oxygen from the air we breathe enter the red cells in the blood. Red blood cells then carry oxygen around the body to be used in the cells found in our body. The lungs also help the body to get rid of CO2 gas when we breathe out.

5. The Bronchi & Bronchioles Bronchi are the main passageway into the lungs. When someone takes a breath through their nose or mouth, the air travels into the larynx. The bronchi become smaller the closer they get to the lung tissue and are then considered bronchioles. These passageways then evolve into tiny air sacs called alveoli, which is the site of oxygen and carbon dioxide exchange in the respiratory system.

6. The Diaphragm The diaphragm is the main muscle of respiration. Contraction of the diaphragm muscle expands the lungs during inspiration when one is breathing air in.

7. Breathing Process The breaking process is controlled by the diaphragm. When the diaphragm contracts the chest expands and the lungs fill up with air. Then the diaphragm relaxes and pushes the air out of the lungs.

8. Homeostasis The respiratory system maintain homeostasis in the body through gas exchange. The respiratory system cycles in new oxygen for cellular respiration and releases CO2, a waste product. This maintains the balance of gases in our body.

9. Asthma A condition in which a person's airways become inflamed, narrow and swell, and produce extra mucus, which makes it difficult to breathe. Symptoms: difficulty breathing, chest pain, cough, and wheezing, which can occur at night, during exercise, can be chronic. Treatments: Rescue inhaler, controller inhaler, and longer-lasting inhaler for chronic symptoms. Causes: Environmental factors (smoking or airborne allergens) and genetic factors.

10. Tuberculosis A potentially serious and contagious infectious bacterial disease that affects the lungs. Symptoms: Cough, sometimes with blood, weight loss, night sweats, and fever. Treatments: Antibiotics to stop the growth of bacteria. Causes: Bacteria in a person's lungs spread through the air.

11. Respiratory and Circulatory System The respiratory system brings oxygen to the lungs which the circulatory system uses to pump blood throughout the body. Oxygen from the lungs gets delivered to the left side of the heart. The heart pumps the blood into the bloodstream. As the blood cells travel around the system, it burns oxygen which turns to CO2 and the blood gets pumped back to the heart.