Every week one student in our class gets to sit out the super quiz and write the weekly update. This week’s update was done by 6th grader Robyn Hergert Thanks, Robyn!
This week in Mr. Houck’s class we studied the skeletal system. We learned a lot about how some of the bones in the body will be fused together and others will be joined together. One example of a fused-together bone is the cranium (skull), which is made up of 22 bones. One example of a bone that is attached is the humerus, which is connected to the radius and the ulna by ligaments.
One other thing that we learned about was ligaments and tendons. Ligaments are strong tissue that will keep bones held in place. Tendons are bands that are made up of collagen fibers that join muscle to bone.
The last thing we learned about were the types of joints. There is the ball and socket, pivot, hinge, gliding, saddle and ellipsoidal. The ball and socket joints are shoulder and leg and the pivot joint is your neck. The hinge joints are your elbow and knee. The gliding joints are your ankles. The saddle joint is your thumb. Last is the ellipsoidal joint—that would be your wrist.