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Download 7.3 Respiratory system
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Respiratory System Write in complete sentences! Don’t talk during the Catalyst! HW ON YOUR DESK! Catalyst: 1. Describe the function of each of the following: Red blood cells Blood plasma Right ventricle Left ventricle 2. Describe TWO ways the circulatory system maintains homeostasis. Have you ever wondered… Why people pass out when they hyperventilate (breathe too fast)? What happens when food “goes down the wrong pipe”? Why people pass out if they hold their breath for too long? Agenda Catalyst/HW Review Anatomy of the respiratory system Back to Homeostasis T-SHIIIIRRRRRRTTTTT TIMMMMMEEEEE! YOU’RE THE DOCTOR! Exit Question Remember the circulatory system? Right atrium receives deoxygenated blood Right ventricle pumps deoxygenated blood to the lungs Then, the lungs oxygenate the blood HOW does this happen Gas exchange Key Point #1: Oxygen enters your lungs through a specific path Nasal Cavity Larynx Trachea Right/Left Bronchus Alveoli Nose Your epiglottis and diaphragm help out! Nasal cavity Nose *Epiglottis Larynx Trachea Right Bronchus Left Bronchus Alveoli *Diaphragm Gas exchange Key Point #2: Gas exchange occurs in the alveoli Gas exchange = diffusion of CO2 and O2 Alveoli = little sacks in lungs CO2 from the blood diffuses into alveoli (then you breathe it out) O2 from alveoli (from when you breathed in) diffuses into blood Homeostasis Key Point #3: The respiratory system maintains homeostasis by keeping the right ratio of O2 and CO2 in the blood inhale O2 O2 diffuses from alveoli to RBCs CO2 diffuses from blood plasma to alveoli breathe out CO You Checks for Understanding 1. 2. 3. 4. Trace the path of oxygen as it travels from your nose to your lungs. Describe gas exchange. (What is it? Where does it happen?) Explain how the respiratory system maintains homeostasis. Imagine that a patient falls and cracks her ribs. The cracked rib pierces the patients right bronchus. How will this injury prevent her respiratory system from maintaining homeostasis? (Think: why might she die?) T-Shirts! Expectations Work in groups and discuss the questions. Each person must design their own t-shirt. Drawings must answer the questions only. Think before you draw. Remember, you’re being paid for quality, accurate work! T-Shirts! Coming down from the neckline of the t-shirt, draw the trachea. What does it do? T-Shirts! The trachea splits into the right and left bronchus. Draw them. What do they do? T-Shirts! The bronchi are surrounded by lung tissue. Draw the lungs. Leave room in between the two lungs for the heart. T-Shirts! Draw the alveoli. Draw an arrow pointing at the alveoli, and explain what they do. T-Shirts! In between the lungs, draw the heart. Label EACH of the four chambers of the heart. T-Shirts! Color in BLUE the chambers of the heart that have DEOXYGENATED blood. T-Shirts! Draw a BLUE arrow to show CO2 in deoxygenated blood being pumped into the lungs. Draw a second blue arrow showing how that CO2 is breathed out. T-Shirts! Draw a RED arrow to show O2 being breathed in and traveling through the trachea. Color the lungs red to show that they are rich in O2. T-Shirts! Color in RED the chambers of the heart that receive OXYGENATED blood, thanks to the lungs!!! T-Shirts! Below your drawing of the respiratory system, copy the sentence below and fill in the blank: “The respiratory system maintains homeostasis by _________________________.” THERE’S A PATIENT IN THE ER!!! Key Point Wrap-Up Key Point #1: Oxygen enters your body through a specific path Key Point #2: Gas exchange occurs in the alveoli Alveoli = little sacks in lungs Key Point #3: The respiratory system maintains homeostasis by keeping the right ratio of O2 and CO2 in the blood Exit Questions Write in complete sentences! Don’t talk during the Exit Question! What is gas exchange, and where does it occur? OMG, someone shot Ms. S in the lungs and the bullet pierced her alveoli! Describe the function of her alveoli. How will this injury stop her respiratory system from maintaining homeostasis? (Think: why will she die?)
