Skeletal System

Function: The Skeletal System allows your body to move, provides structure, produces blood in the bone marrow, and protects your organs.

The organs in the skeletal system are the bones, ligaments and joints, tendons, cartilage, pivot hinge, gliding joints and ball and socket joints. The function of the bones are not only to provide support and protection to the viscera (with the help of muscles attached to them) but also produces blood cells for the body from the bone-marrow. The function of the ligament and joints is to allow the bone to move in a particular direction and hence enhances the movement of body parts in desired direction. The tendons job is to join the muscles to the bones, hence they are more flexible so as to provide greater range of movement. Cartilage not only plays a role in maintaining and forming the shape of human ear and nose as well as other organs, but also protects the bones against friction forces, or else the bones would corrode easily. The pivot joints allow for rotation around an axis. There is a pivot joint at the top of your head that lets you move your head side to side. The hinge joint can open and close like a door. Your elbow is a hinge joint for example. The gliding joint features two bone plates that glide against one another. The joints in your ankles and wrists are gliding joints. Ball and socket joints, these joints allow for forward motion, backward motion and circular rotation.  Some examples of this include your shoulders and your hip.


Interacting: The skeletal system works with the muscular system, muscles connect to your skeleton and they contract and move the skeleton along. Also, the skeletal system works with the circulatory system. Marrow inside of your bones helps produce the cells inside of your blood.

Analogy: 

The human skeleton is like a building set with many little pieces. It is assembled from more than 200 bones, about half of which belong to the hands and feet alone. Sometimes however, skeletal development in the embryo can become disordered. Some people are born with an additional finger, while the fingers of others are too short, for example. Even whole bones can be missing, or joints do not exist and bone elements are therefore fused together. For legos, the same thing can happen, they're may be too many or too little, or they could be fused together.

  

Structure and Function: The ball and socket joints make sense for what they do. First of, it literally looks like a ball in a socket, so the advantages of having a ball type thing in a socket is that it can flex, turn, etc. Which is the function of the ball and socket joints, to allow forward motion, backward motion and circular rotation.

Links: http://www.biology4kids.com/files/systems_skeletal.html, http://health.howstuffworks.com/human-body/systems/musculoskeletal/bone11.htm, http://kidshealth.org/en/kids/ssmovie.html,https://www.brainpop.com/health/bodysystems/skeleton/