Presentation on theme: "Dissecting a Leg We can learn about our skeletal system by looking at the skeletal system of other animals."— Presentation transcript:
1Dissecting a LegWe can learn about our skeletal system by looking at the skeletal system of other animals.
2The human leg is very much like the leg of a chicken. Both have a large thigh bone, a knee joint, and two shin bones.
3Just like your leg, the chicken leg has: SkinBoneMuscleCartilageFat
4Pull the skin back and look for: Blood vessels in the skinCartilage around the boneJointMuscleFat
5Use your scissors to cut away some of the meat so you can find: Cartilage protecting the end of the boneTendons that hold the muscle to the boneDifferent shaped muscleLots of fat
6Cut away the rest of the muscle so you can see the joint and cartilage. The joint bends just like a human knee.Look at the cartilage protecting the bone.
7This leg has a hinge joint This leg has a hinge joint. It allows the joint to move in one direction only.Look at how the two parts fit together so that the joint can bend.Ligaments hold bone to bone.Cartilage keeps bones from touching each other.
8Break the bone to see the marrow. Marrow is red and jelly-like.Marrow makes red blood cells that carry food and oxygen to all the cells of our body, and platelets that allow our blood to clot.
9When you eat a chicken leg, remember what you have learned about your skeletal system. cartilagebonejointtendonmarrowligamentmuscle