What’s for Dinner? Today • Follow along with this powerpoint as I go over what we will do during the dissection tomorrow. Chicken Leg Dissection • Tomorrow you will be dissecting a raw chicken leg from the Guilford Food Center • You need to let me know TODAY if you are unable to do this dissection (and I will need to hear from your parents) Safety Concerns! • Wear gloves at ALL times • Do NOT CROSS-CONTAMINATE and touch your pencil with your contaminated hand or glove (you will use it in your next class) • Cut AWAY from your body • Do not walk with shears (scissors) • Keep hair up and sleeves rolled back Clean Up • Clean table when done • Wash hands when done! • Destroy the microbes! Procedure 1. Clear off your desks 2. Get a pair of gloves-make sure they fit, you will only get one pair. 3. Follow the Directions!!!!!! 4. What you will see and do: Bones and Muscles! • You will see the skeleton you have learned about • You will see muscles you have learned about • Do muscles work in pairs? • Yes! Skeletal Muscles Work in Pairs • Flexors – Muscle that pulls on a joint to make it bend – Contracts as the Extensor relaxes • Extensors – Muscle that pulls on a joint to make it straighten – Contracts as the Flexor Relaxes Sketch the Chicken Leg Chicken Leg Quarter 1. Remove Skin and Connective Tissue 2. Observe Muscle, Cartilage & Tendons Skeletal Muscle Belly • Muscles are in bundles called: Muscle Belly 3. Remove Skin & Muscles 4. Remove Ligament at Joint http://kidshealth.org/misc/movie/bodybasics/bodybasics_knee.html Follow your Directions • • • • Please follow Your Directions Answer questions when you are done Clean up area when you are done If you choose to only observe, you will take notes for your group Homework : Conclusion Question Worksheet about your observations Pre-lab QuestionsAnswer on your paper • What does it mean if a muscle is contracting? • What does flexor muscle do? • What does an extensor muscle do? Prediction Questions http://kidshealth.org/misc/movie/bodybasics/bodybasics_knee.htmlww.youtube.com/watch?v =wyiJw034ssA • • • • • • Watch the animation above and predict what bones you will be able to observe. What joints will you be able to observe? What bones you will be able to observe? What joints will you be able to observe? Which connective tissues will you be able to observe? Where will you find an extensor muscle? Where will you find a flexor muscle? Questions • http://kidshealth.org/kid/interactive/bones_it.html Go to the interactive link above from kids health and answer the questions. 1. What can you find inside of Periosteum? 2. What are the THREE things red bone marrow produces? 3. Draw a cross section (open side view) of an open bone Brainpop! • www.brainpop.org • Login: adamspop2 Password: brainpop • MUSCLES • • • • What is another name for voluntary muscles? What do these muscles work to do? What connects the muscles to bones? How are your facial muscles different from most other skeletal muscles? • What powers your muscles? • What happens if your muscles do not have enough oxygen?