RESPIRATORY SYSTEM How do we breathe?

Warm Up 10/31/11 Answer the following questions in your notes (your side): 1. What organ helps us to breathe? 2. What gas do we breathe in? 3. What gas do we breathe out? 4. What blood cell exchanges the gases that we breathe in and out? 5. What would happen if we didn’t breathe?

Based on our warm up…..  We already know quite a bit about the respiratory system based on what we have learned so far. 1. We learned from the atmosphere unit that we breathe in oxygen and breathe out carbon dioxide. 2. We learned from the circulatory system that our red blood cells carry oxygen to our cells and carbon dioxide away. This helps us conduct cellular respiration. But, what is cellular respiration?

Cellular Respiration lab: Objective: We are beginning the respiratory system today. By the end of today each of you will be able to explain what cellular respiration is. Essential question: How does cellular respiration affect the way we breathe? Why do we need to know this? If you know what cellular respiration is, you know how your cells breathe. Your cells breathing allows your tissues, organs and organ systems to breathe. If they breathe guess what? YOU BREATHE!

Inquiry Lab: Cellular Respiration  You will be placed into groups of four.  You will receive a lab sheet. You will be given lab materials: DO NOT TOUCH ANYTHING UNTIL I TELL YOU TO!!!!

What is cellular respiration (yes, this is notes) Recipe for cellular respiration:  In order to happen:  We need glucose (sugars) from food and oxygen (breathing)  This creates energy for our cells.  Released from this recipe is energy and Carbon Dioxide.  Sugars + oxygen = energy + CO2 + H2O

Lab  Each of you will get into groups of 4.  Be on your best behavior if you want to continue to do labs.  Before you begin (that is TOUCH ANYTHING) make sure you have read the introduction and understand it! Also, you must complete the hypothesis section. Times: Intro: 2 minutes Hypothesis: 4 minutes DO NOT start the procedure until I tell you to do so.

Procedure  Each group will send one student to grab materials.  When I say go, you can start the procedure.  Once you finish following the steps be sure to record your observations.  Work quickly you only have 10 minutes!

Stop and Clean Up  Lets take 3 minutes to clean the class, settle down and get organized.

What did we just observe?  We just saw cellular respiration.  Inside our cells, Cell respiration is the process where nutrients (glucose) are broken apart and ENERGY is released.  Why do we need cellular respiration?  Cellular respiration helps our body get energy. Without cellular respiration our body wouldn’t be able to carry out the basic functions for life.

How does this connect to us breathing? (yes, write this in your notes)  Your cells are able to respire or breathe when your red blood cells deliver oxygen and take away carbon dioxide.  In order for this to take place, your cells need energy.  Therefore, when your cells break down sugars they provide the energy that is needed to swap gasses (carbon dioxide for oxygen).  When this happens our cells conduct “respiration” or breathe. When your cells breathe, so do all of the things that are made up of cells- this means YOU!

Questions or clarifications  Before we move on, does everyone understand how cellular respiration helps us breathe?

Independent practice  Answer the last three questions on your sheet.  As seen on the board, if you don’t finish its homework!

Warm Up 11/1/11 In about 1 paragraph, briefly describe what you learned in yesterdays lab/class. Be sure to include how cellular respiration helps the human body to breathe.

Quick review List all of the parts of the respiratory system that you can think of….. You have 3 minutes.

So what do we know?  We know the lungs and the blood cells help us breathe.  But how?

Key Points (copy these in your notes)  The respiratory system is how we get oxygen to our cells.  The key parts are lungs, trachea, nasal passage, bronchial tubes, alveoli, pharynx.  We release CO2 through cellular respiration.

Lets breathe and see how it works?  We will do the explore activity in small groups on page B37

Notes  Draw the picture on page B41 on your side of your notebook.  Be sure to label the parts.  Also label the alveoli (it looks like a sponge at the bottom of the page).

What else does the respiratory system do?  Speech  Water removal  Read the sections on page B42 and B43 and answer 1-6 on your side of your notes.