The Skeletal System
The Skeletal System is a very important part of your body and without it you would be a huge blob of skin and organs and tissues. It would actually be pretty gross. Without your bones you wouldn’t be able to walk, or write, or talk, or anything else. When you are born, you have about 300 bones made of mostly cartilage. Cartilage is a soft "mushy" substance that acts as a pad. As you reach adulthood the cartilage turns to bone, and some of your baby bones join together to form larger bones. By adulthood the average human being will have 206 bones in their body.
The bones in your body do more than just stand you up and keep you looking good. God made the skeletal system, ...view middle of the document...
Some great examples of joints in your body are your elbow, your neck, your wrist, your back, and your knees.
The third function of the skeletal system is storage. The skeletal system actually stores lots of chemicals for your body’s use. For example the skeletal system stores minerals such as calcium, magnesium, and phosphorus. Your skeletal system, or your bones also store fat or adipose tissue. The adipose tissue is found in something called yellow bone marrow.
The final function of the skeletal system is hemopoiesis. This is actually just a fancy word for the process of manufacturing blood cells. Inside certain bones there is red bone marrow. This red bone marrow produces red blood cells which end up in the blood stream. Red bone marrow also produces white blood cells as well.
Inside your body there are several different kinds of bones, 5 to be exact; long bone, flat bone, irregular bone, short bone, and sesamoid bone. Although they are all important and serve a purpose, let’s just focus on taking a look inside of a long bone. There are 4 layers of bone present, the outside layer of a bone is a thin, tough membrane called the periosteum. It is basically just a hard, thick shield for the bone.
The next layer down is called compact bone. This kind of bone is very hard and smooth and it is the kind of bone that you can physically see when you look at a skeleton. Then you have the cancellous bone, or the spongy bone, this type of bone is still hard but not as hard as compact bone. It is still very strong none the less. Spongy bone gets its name from the fact that the bone itself resembles a sponge.
The last layer of bone is called the bone marrow and is found in the center of the bone. There are two types of bone marrow, red and yellow, red bone marrow produces red and white blood cells for your body & yellow bone marrow stores lipids or adipose tissue in your bones. Both are equally as important and without them our bodies wouldn’t be able to work.
Now before we go any further I think we should talk about the skeleton as a whole. As we all know, we only have one skeleton, but inside that skeleton there are two parts or sections, that are reffered to as skeletons themselves. You have an axial skeleton and an appendicular skeleton. The axial skeleton has 80...