Friday, September 24, 2010

Skeletal System and Joints

Bones are one of the most important parts of our body. They support our shape and weight, protect vital organs, and allows us to move. There are two types of bones one is compact and the other is spongy. Compact bones have denser tissues covering on the external part of the bone while spongy bones are more on the internal part forming red bone marrows that red blood cells enter and flow around the blood. Bones have also origins. Osteoprogenitor cells are known as non-specialized cells. This is the first stage in forming bones. When non-specialized cells are involved it is called osteoblasts which is the building stage of bones. When osteoblasts are fully completed, they are called osteocytes which can also be called fully grown osteoprogenitor cells. After the osteoproginer cells in order to improve its structure, osteoclasts take place tearing down the bone itself and reconstructs. Aside from growth and classification of bones, different movements can also be classifiedfon the different regions of the body. Hinge joints is an example that can be found on elbows, ball-and-socket joints found in the shoulder bones, and pivot joints for neck and the forearms.

During the dinosaur age, bones are proven to be real. As you can see in museums, bones are wondrous works of art made by our body. Without them, we'll probably never find out how we, humans, were originated from the ancient times.

Based from the lessons we tackled this week, I can conclude that the skeletal system is a primary foundation for students to learn biology before tackling other systems. As I observe many organs from different systems are much likely involved in the skeletal system. Along with the tissues connected to the bones of our body they may be able to perform their tasks well for storing minerals, protecting vital organs from injury, and provide structure and framework for the body to move .