jademanatee+skeletal+system

__ **Skeletal System** __ ﻿﻿To see my POSTER click here To see my WEB click here To see my BIBLIOGRAPHY click here To see this page in SPANISH click here

[|The skeletal system] has many different functions, and they are all important. Its first function is protecting organs. One major set of bones is the ribs. They protect lungs, the heart, kidneys, and many more important organs. A second function it has is giving shape and support. Your bones determine the shape of your body. Shape, support, and protection are some of the main functions of the skeletal system.

The bone has material inside it too, and it also has a very important function. One of the things the inside of a bone does is produce blood cells. Inside the bone is bone marrow, and that marrow is like a factory making blood cells. A second function inside the bone is storage. The bones store minerals and other materials like calcium and phosphorus. When your body needs those substances, they are released into the blood. All parts of the bone are crucial: inside and out.

The skeletal system has no organs, but the inside of a bone is almost like an organ. The first layer in your bone is the outer membrane. That layer is a thin membrane that seals the bone. The next layer is compact bone. The compact bone carries blood cells and nerves, but also protects the other inner layers of the bone. The next layer in your bone is spongy bone, or cancellous bone. The next layer in the bone is bone marrow. Bone marrow is the very center of a bone. There are 2 types of bone marrow, red and yellow. Yellow bone marrow is more common and its main function is storing fat cells. The second type is red; [|red bone marrow] contains and produces blood cells. The bone has many layers to it, and each layer is very important.

Another part of the [|skeletal system] that could be like an organ is joints. Joints are where two bones connect. Within the joints are two materials that make the movement smooth, one is connective tissue, and also synovial fluid. There are two main types of joints, movable and immovable joints. Most immovable joints are in your skull, but almost all other joints are movable. The first joint is a ball and socket joint. A ball and socket joint can move in all directions. One ex ample of this is your shoulder. The next joint is a pivot joint, which is the joint in your neck. A pivot joint can move side to side, but not in a full circle. Another type of joint is a hinge joint; both your elbows and knees are examples of hinge joints. A hinge joint is like a door hinge, it “bends” one way, like a folding book. Some bones in ankles and wrists connect with the 4th type of joint, a gliding joint. A gliding joint connects two bones so they can glide over each other. The skeletal system has no organs, so joints and bones are like organs.

The main way that the skeletal system interacts with other systems is by protecting them. For example, the ribs protect the lungs, which are part of the respiratory system. The skeletal system also works more closely with some systems. One is the circulatory, because of the blood cells produced in the bone marrow. A second system that the bone marrow is also connected to is the immune system with the white blood cells. Another system that works with the spine is the nervous system. The nervous system sends information from the brain to the rest of the body through the spinal cord. The spinal cord is surrounded by vertebrae, which are bones in your spine. The last, and probably most important, system that bones work with is the muscular system. When muscles pu ll on bone, they move. Without muscles bones would not move or stay in place. Because of the bones’ protection, the skeletal system works with practically every system.

Your skeletal system can get a disease, but, more commonly, it just gets injured. One disease of the skeletal system is [|Osteoporosis]. Osteoporosis happens when you get older, more commonly in women, as your bones start to lose minerals. One injury in the skeletal system is a [|dislocation]. That’s when the end of one bone comes out of the joint. A second injury to your bones is a sprain. A sprain is when the ligament around your bone is twisted too far and tears. These are three of the injuries, or diseases, in the skeletal system.

Another more common injury to the skeletal system is a fracture. There are many different types of fractures, or breaks in the bone. One type is a hairline fracture, where there is only a small crack in the bone. A second, complete fracture, is when a bone is cracked into two pieces. Next is a greenstick fracture, when a bone is cracked partially through. Fourth, a single fracture, the bone breaks in one place. Another is a comminuted fracture, when the bone breaks into many pieces. A sixth type is a bowing fracture, where the bone, usually of a child, bends, but doesn’t break. The last is an open fracture, that is when the bone breaks and goes through the skin. There are many different types of diseases, fractures, and other injuries in the skeletal system, but it’s very easy to keep them healthy. Always wear the proper safety equipment when playing sports. When you exercise, your bones get stronger by having to support your weight, so exercise. Finally, eat lots of dairy products to give your bones calcium. Diseases in your skeletal system are rare and injuries are often not that bad, but still try to keep your skeletal system healthy.