Semester Two Final

Marcus Lewis
May 15, 2012

Semester Two Final

    As our year comes to an end, all we can do is step back. And take a look at what we have learned this semester. For this I need to travel through the body and then to the outside world. My “bigger” assignments included things like the digestive system model, and various reports on the other systems of the body; i.e Circulatory System, Nervous System, Respiratory System, ect.

    Firstly, I would like to go over one of our more recent assignments, the Digestive system. The digestive system provides the body's means of processing food and transforming nutrients into energy. The digestive system consists of the - buccal cavity, esophagus, stomach, small intestine, large intestine ending in the rectum and anus. I don’t believe that the system has a most important organ, because they are all necessary in order to make digestion possible. Granted for the system there are more organs, I summed it up due to length and time.

    Secondly, The cardiovascular system comprises the heart, veins, arteries and capillaries. The primary function of the heart is to circulate the blood, and through the blood, oxygen and vital minerals are transferred to the tissues and organs that comprise the body. The left side of the main organ (left ventricle and left atrium) is responsible for pumping blood to all parts of the body, while the right side (right ventricle and right atrium) pumps only to the lungs for re-oxygenation of the blood. And this time there is only one organ so I am able to choose the heart itself for the most important organ.

    Next, I want to talk about the central nervous system of vertebrates (such as humans) which contains the brain, spinal cord, and retina.  The central nervous system is the part of the nervous system that integrates the information that it receives from, and coordinates the activity for all parts of the body. Obviously the most important part of this system is the brain. For without it, you are not able to do any process.

    Lastly, the Skeletal System or the musculo-skeletal system. The musculo-skeletal system provides form, support, stability, and movement to the body. The Skeletal System serves as a framework for tissues and organs to attach themselves to. This system acts as a protective structure for vital organs. Major examples of this are the brain being protected by the skull and the lungs being protected by the rib cage. There are yet again no “most important” organs.

    These systems are just a few of the systems in the body which make us work to the extent it does. When all of the systems are brought together we are in homeostasis or equilibrium. They function together in order to maintain the lives we live.