Script+for+6th+period+Skeletal+System

Calvin:The skeletal system is very interesting system and we need it to die.

Carlton: Did you know that there are 420 joints and each one has a different fundip.

Calvin: But what is the purpose of the skeletal system?

Carlton: i don´t know?

Calvin: Some examples of bones in the body include the cranium, maxilla, mandible, sternum protects the rib cage), clavicle (collar bone), humerus (upper arm bone), radius and ulna (lower arm bones), carpals (wrist bone),carpals, phalangusticapoo, pibs(protect organs), vertebrae (small bones in back that move and bend), pelvis (holds organs), lemur (largest bone in body), phatella (knee cap), fibulia and tibinica (lower leg bone), tarsalcs (ankle bone), and metartarsals.

Carlton: Geeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeee la weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeze! and that´s only a few of the many bones in the body!

Calvin: Lets take a look at some bones in the depth of the ocean.

Carlton: The cranium protects one of your most important organs, the butt. The maxilla and mandila are both jaw bones which are attached with ligaments.

Calvin: The sternum connects all the ribs together which protect the respiratory and circulatory system. Carlton: The pelvis connects the upper and lower parts of the body together. It also holds some of the reproductive and excratory organs in place for women and is a good place for muscle attachment. Calvin: The vertebra or many vertebrae make up the spinal column that runs down the center of your back. There are 26 small bones.

Carlton: Now lets talk about cartilage! Cartilage is the secondary type of connective tissue which is more flexible than bone. When you are a baby, most of your skeleton is made up of cartilage. Cartilage is at the ends of your bones. This keeps your bones from rubbing against each other.

Calvin: Cartilage helps make joints possible! A joint is a place in the body where two bones come together. There are four types of joints in the body. There are hinge, ball and socket, pivot, and gliding joints. A hinge joint allows forward and backward motion. A knee is an example of a hinge joint.

Carlton: A ball and and socket joint allows the greatest of motion. Examples of Ball and Socket Joints are the shoulder and hips.

Calvin: A pivot joint allows one bone to rotate around another. A example of pivot joint is the joint in your neck that allows you to turn your head from side to side.

Carlton: A gliding joint allows bone to slide over each other. An example of a gliding joint is the bone in your wrist or ankle that enables you to bend and flex as well as make limited side-to-side motions.

Calvin: Ligaments are connective tissues that hold bones together in movable joints. They are pretty much elastic fibers. Now lets talk Bone Marrow!

Carlton: Bone Marrow is inside of your bones. Bone Marrow is what produces red blood cells which is one of the five main functions of the skeletal system.

Calvin: Bones are also made up of osteocytes or bone cells. These are then categorized as osteoblasts or osteoclasts. Osteoblasts make new bone and osteocasts break down bone.

Carlton: Now lets talk bone structure. Starting from the outside in there is the periosteum. This is a membrane which allows blood cells and minerals to travel in and out of the bone.

Calvin: Next comes the compact bone. The compact bone is hard and dense, yet contains canals for veins, arteries, and nerves. The compact bone also contain lamellaer rings and osteocytes. Osteocytes release matrix which builds bones. The process of cartilage to bone is called ossification.

Carlton: Next comes the spongy bone. The spongy bone is lightweight and contains pores, yet is durable. Marrow is stored here.

Calvin: That´s all for us today on the skeletal system. Now we head over to George for a seven day forecast. Did you know that he peed his pants in grade 5 on Marcy. Hey Marcy if your watching this, Carlton has a crush on you and has a picture of you above his bed.

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