BackgroundCertain principles of muscle function help us tounderstand bone-muscle relationships. First, skeletalmuscle contracts only if it is stimulated by thenervous system. Second, skeletal muscles usuallyproduce movements by pulling on bones acrossjoints. The bones serve as levers and the jointsserve as fulcrums. Third, muscles usually lie next tothe bones they move. And,finally,muscles usually actin groups.
ProcedureStep 1• Carefully extend the wing to find out how many majorparts it has.• Include a photo of the external structure.Label: upper arm, elbow, lower arm, and hand.(wing tip).
Procedure Step 2 Use scissors to cut the skin as shown .Try not to cut through the muscles located beneath theskin
Procedure Step 3Remove as much skin from the thickestpart of the wing as possible, exposingthe underlying muscle Observe the muscle. The muscles arebundles of pale pink tissue thatsurround the bone.
Procedure Step 4• Photograph any yellow tissue found insmall clumps on the inside of the skin.This is a type of connective tissuecalled fat.
Procedure step 5• Remove any remaining skin from theelbow joint.• Locate, and label a tendon. Tendonsare shiny white tissues at the ends ofthe muscles that attach muscles tobones.
Procedure step 6• Locate, and label a ligament. Ligaments are shiny white tissueat the ends of bone.
Procedure step 7• Locate, photograph and labelcartilage. Cartilage is theslippery shiny white tissue atthe ends of bone.
Procedure step 8• Once you have identified thefollowing parts: skin, muscle,tendon, ligament, cartilage andbone, call your instructor overfor a group oral quiz and initials.
Procedure step 9 Clean UP!!!• Throw away all chicken wingparts into the designatedcontainer.• Clean dissection tools andplace into beaker. Stack traynext to beaker.Wash your hands thoroughlywith soap and water.
Your own reading/researchUse information from leaflets, newspapers,books and the internet to find out thefollowing:• What is salmoneliosis?• How do people catch Salmonella?• What can a person do to prevent this illness?
Questions: (hint hint!write them in yournotebook!!!)1. What function is performed by ligaments?_________________________________________What is the function of a tendon? ________________________________________________2. What is more proximal, the insertion or the origin for the attachment of the muscles in the chicken wing?3. What tissue is referred to when one speaks of the “meat” of the chicken?4. Name the two main types of movement that occur when a wing is raised and lowered in flight.5. What bone in the wing is connected to the chicken’s body at the shoulder? ____________________6. Name the two bones found in the forearm of the wing. ________________ _____________________7. What type of joint connects the wing to the body? _______________________________________8. What type of joint moves the wing at the elbow?9. The muscle you observed is classified as what type of muscle tissue? ____________________________•