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Digestive System What happens when we eat?
Warm Up Answer the following questions on notebook paper. I will be collecting this! • What is the job of the digestive system? • What organs are involved in the digestive system? • How does the digestive system help you maintain homeostasis? • List one connection between the digestive system and another body system we have learned about.
Announcements • Connections Project (skeletal, muscular, respiratory and circulatory systems) will be due on this Friday, December 2nd. • If you do not have a copy of the rubric get it off my webpage. You MUST turn in the rubric with the project. • You will have a Science formative Monday, December 5th . We will review on Friday. • Your next quiz (digestive) will be on Thursday, December 8th.
Digestive system song • Write out as many terms as you hear when the song is playing. • Be able to explain how digestion takes place.
What happens when we eat? • If you can behave, you will receive candy for this activity. • If not, you will imagine you have candy for this activity. • In pairs, you will briefly describe in your own words what happens as you eat a piece of candy. • Describe what body parts are being used and what happens at each step in the process of eating the candy.
So what happens? So now that we have ideas…… • Share with one other group your ideas about what happened once you ate the candy. • Lets share these ideas out as a whole group. Now, what really happens……………
Jobs (yes, these are notes) The digestive system does the following things: • The digestive system breaks down food so it can be absorbed by your body through the blood stream. Steps • Breaking down food is how nutrients get into our body to give us the energy that we need to move. • Our bodies are unable to directly dissolve food into the blood. • Salivary glands and our teeth start the breakdown of food inside of our mouths by using enzymes and mashing our food. • Stomach churns the food and adds acid to break it down. • The intestines absorb nutrients into the blood stream. • Colon release waste from the body.
Parts • There are two main parts of the digestive system. Upper digestive system: This is where food enters the body and is broken down into smaller pieces for absorption. Lower digestive system: This is where food is absorbed in the blood stream and the waste product is removed in the body.
Organs Upper Digestive System: esophagus, stomach, and duodenum Lower Digestive System: Small intestine- this includes the enzymes from your pancreas, gallbladder and bile. Large intestine- this includes your colon, rectum and anus.
Project Time! • You have the rest of today’s class period to work on your project. • Its due Friday, so use this time wisely. • I will not give you all any more class time to work on your projects! • This is also the time that you can use to ask me questions if you are confused or need help!
Warm Up 12/1/11 Copy the following statements in your notebook. Decide if these statements are true. If not true, correct them. • The digestive system works with the respiratory system to make cellular respiration possible. • Carbon dioxide is necessary for cellular respiration. • The digestive system is involved in the speech and water removal.
Announcements • We will be doing a lab today based on how well we can behave. • Tomorrow we will be reviewing for our formative test on Monday. Get ready! • YOUR PROJECTS (including the rubric) ARE DUE TOMORROW! • Today is world AIDS day! • Good luck on your project!
Types of digestion • There are two ways that food is broken down in the human body: • Mechanical digestion • Chemical digestion So what’s the difference?
Mechanical digestion • This is when food is broken down into smaller pieces in a physical way. (they literally get smaller). • The process of breaking down food is called mastication. • Your teeth chew food so that you can swallow it. • Your stomach mashes and pounds the food you eat through a process called peristalsis.
Chemical digestion • This is when chemical changes actually change the food we eat into different substances. • Our saliva has enzymes that break down food and turn it into sugars or other forms.
Quick practice Tell me if the following actions are mechanical or chemical digestions: • Biting into an apple. • A piece of candy mixing with your saliva • Chewing a piece of candy. • Your stomach mashing and pounding food you just ate.
Bread Lab (25) • We will get into groups of 4 • We will see the differences in digestion as we do the lab. • Once you are done complete the reflection questions.
Since we can’t behave Your assignment is: • Turn to page B45. Copy the vocabulary words with the definitions. • Copy the picture of peristalis on page B46 with the definitions.
Reflection ?’s • What did the ziploc bag represent? • What did the bread represent? • What happened when you added the liquid substance to the sandwich bag? • Did this make mashing the bread easier or more difficult? • Why do you think mashing the bread is easier with a liquid? • How do you think the bag and bread relate to digestion in humans? • What happened when you added the substance? • When you broke the bread apart with your hands which type of digestion is it? • When you added the liquid which type of digestion is it?
Warm Up 12/2/11 Describe what happens when you eat food in a paragraph or more. Be sure to use the at least 3 words out of the word bank: mastication, digestion, peristalis, absorption, blood stream, mechanical digestion, chemical digestion
Announcements • Today we will review for formatives! Your formative will be on Monday. • You will also get a notebook check on Monday. Make sure you update your notes so that you get a good grade • Get ready for your quiz on the digestive system next week (Thursday)! • We will be having a JMMS science fair. I will give you updates when they become available! • PROJECTS DUE TODAY!
Review for formatives today • You will receive a list of questions. • You will answer the questions in pairs or individually (depending on behavior). • Once we are done practicing the information we will play a review game for the last couple of minutes in class. Depending on our behavior. • Remember, you are taking the formative on Monday, so review as much as you can! • As you review, if you see your missing notes update them. You will be graded on your notebook.
Warm Up 12/7/11 • What is the job of the salvia in our mouths within the digestive system? • What is the job of the stomach? • If I were to eat a carrot, what organs would be involved in digesting it?
Announcements • See the board for the new locker policy. • If you did not finish your formative test yesterday you will do so during today’s lesson. That means you will need to come during Cougar Time on Friday to make up your work. • Quiz Friday @ the beginning of class. • Progress Reports go out. Check the no name folder (if your paper is there, it’s a zero) • Check wiki page for all homework assignments. Its updated on Tuesdays
Digestive system recap: • The main job of the digestive system is to break down food so that it can be absorbed into the body through the bloodstream. • Organs of the digestive system include but are not limited to the mouth, esophagus, stomach, small and large intestine. • The digestive system helps us to maintain homeostasis because makes sure that our cells are able to get nutrients that are necessary to have energy. Without this energy the body would shut down because it could not function.
Digestive and Homeostasis? • Today’s lesson will explore what happens when our digestive system is compromised. • We will look at several diseases in order to learn what happens when the digestive system is not in balance (that is, maintaining homeostasis). • Make sure you are taking good notes as this assignment will be a quiz grade!
Articles for Stations • You will read different articles and watch different videos about diseases that attack our immune system. • Your job is to gather information to fill in your table! • Answer the questions for each article on YOUR side of your notebook.
Anorexia • http://www.youtube.com/watch?v=JixbTHj6FKY • http://player.discoveryeducation.com/index.cfm?guidAssetId=9F8F1BE4-0B19-446F-B0DC-7F1A92CE5BDB&blnFromSearch=1&productcode=US
Warm UP 12/08/11 1. Main job of the digestive system? 2. List at least 5 organs present in the digestive system? 3. Think back to one of the stations from yesterday. Describe how the disease prevented an individual from maintaining homeostasis.
Homeostasis • What is it? • Why is it important? • What happens if we don’t have it?
Connections • Think about the role of the digestive system in your body. • With a partner, discuss how the digestive system works with other body systems to maintain homeostasis. • The pair with the most CORRECT connections wins a prize!
Video (if we can’t behave we wont watch it!) Jot at least 15 facts down on your paper. You will need this information later
Independent Practice • You will be making a brochure that describes a digestive disease. • In this brocuhure you MUST do the following: • Explain how the disease prevents you from maintaing homeostasis. • Describe at least 1 other body system that is connected to the problem. Be sure to explain how and why there is a connection • What you can do to prevent or correct the disease.
Warm Up • Review for your digestive system quiz. • If its loud, I shut it down
Pre Test Be sure to write this on Notebook paper I will collect it. Label Pre-Test at the top. • What is the job of the endocrine system? • What organs are in the endocrine system? • How does the endocrine system help us to maintain homeostasis? • What connections can be made between the endocrine and other body systems we have learned about.
Endocrine System • I will play a song. • Be sure to jot down as much information as you can about this system. • http://www.youtube.com/watch?v=05AFkD9ipqE&feature=related
What do all of these letters mean? • These are letters that represent hormones? • The endocrine system is made up of glands that secrete hormones. So let’s learn more!
Job • The endocrine system is a system of glands that secrete different types of hormones into the blood stream in order to regulate the body. • Hormones regulate various human functions, including metabolism, growth and development, tissue function, and mood. • An easy way to remember: Greek words "endo" meaning inside, within, and "crinis" for secrete
Why do we need it • The endocrine system is an information signal system that gives the body different messages in an effort to regulate itself. • Different hormones serve different purposes. For example, the hormone insulin is responsible for regulating blood sugar. If your gland (the pancreas) does not secrete this hormone properly your body cannot maintain homeostasis. Some people develop diseases such as diabetes as a result.
Think-pair-share • Think back to health class. What other hormones do we have in our bodies. What do they do? (3 minutes) • In pairs, discuss your ideas. • Let’s share out whole class.
Guided Practice • http://player.discoveryeducation.com/index.cfm?guidAssetId=9B34BE7E-3B9F-424F-B018-483C3CBD58EB&blnFromSearch=1&productcode=DHC
Quiz Answer the following questions on your side of your notebook: • Explain how the endocrine and digestive systems are connected? • Describe how the endocrine and circulatory systems are connected? What role does the blood stream play? • Based on your knowledge from the video, give a specific example of the glands regulating the body.
Warm up 12/12/11 “Glands are an important tool that the body has to regulate itself.” Defend the claim stated above.
Parts of the endocrine system • Glands Examples: salivary gland, exocrine gland, sweat glands. Organs such as the liver, kidneys, heart secrete hormones just like glands