The+Body

__Crash Course for the Body Systems __

Your body has so many systems that keep us going through out the day, the sad thing about this is most of us can only name one or two. This wikipost is designed to help refresh your brain on what some body systems are and will tell you what each one does. I hope you enjoy this wiki and learn a little something about the body and all of the different systems we have. As you can see in the figure 1 below, we will be covering three main body systems; The Nervous System, The Endocrine System and The Reproductive System. To get you into the body system mindset please feel free to be amused by this body system rap, as funny as it may seem it is chock full of interesting and true points. If you enjoyed the video, don't forget to check out this website, it has ever body system we have and gives you a little blurb about what each one does.c [|http://www.factmonster.com/ipka/A0774536.html] I hope you enjoy it :) media type="youtube" key="0yjLJfz6saU" width="560" height="315"Video 1 Figure 1

__The Nervous System __ ==== First system we are going to talk about is the Nervous Systems. The nervous system is one of the most important systems in your body, not only does it store all of the information on that big math test you have third period but at the same time it also controls the beating of your heart, how much oxygen your in taking, the digestion of your food and yes even the amount of stress you should be feeling right about now because you forgot all about that math test third period. Our nervous system controls so much in our everyday lives that we don't even realize, it's scary, our nervous systems is one of the main systems keeping us alive. Think of your central brain like a mass computer, a mass computer that controls all of the bodily functions. This "computer" sends messages back and forth from your brain to different parts of your body. It does this by using the spinal cord, the spinal cord runs from the brain all the way down the back and spreads with branch like fibers out to all the different parts of the body (see figure 2). When a message is received into the brain from any part of the body, the brain will then tell that body part how to react. For an example when you give yourself a paper cut, your finger sends a message to your brain that sends a message to react and pull away quickly(possibly cursing because those things hurt). Fortunately for us we receive messages from our brain quicker than you just read that. If you want to check out a extremely helpful website on all things nervous system, check out this website []==== Figure 2 __ The Endocrine System __ ==== Much like the nervous system the endocrine system is very similar, only the endocrine system works on the body process that happen slowly, for example cell growth. All the fast bodily functions are controlled by none other than the nervous system, for example burning your hand or cutting your finger. These two systems work together to help the body function work properly. The endocrine system is mainly made up of glands and hormones that send chemical messages from one set of cells to another. We have many different types of hormones in our blood stream but each one only affects only the cells its generically inclined to. Now that we have the complicated version of what the endocrine system is lets break it down just a smidge to words we can all understand. A gland is group of cells that produce and gives off certain types of chemicals. A gland will select and remove materials from the blood, it will process it and then once processed it will release the finished chemical back into the blood stream to help out somewhere in the body. There are 20 massively important hormones we have in our bloodstream where they can be transported into cells in other parts of the body. As you see in figure 3 the endocrine system is made up of hypothalamus, pituitary, thyroid, parathyroids, adrenals, pineal body, and the reproductive glands, which include the ovaries and testes. If you want to learn more about what each organelle does feel free to check out this site []. Our hormone levels can be affect by many different events but two of the leading contributors of changes in our hormone levels are stress and infections. What stress and infections can do they change the balance of fluids and minerals in your body. This can be very bad for you and can affect your body, mind and spirit. Than I started to wonder if stress could actually kill you, which lead me to find this wonderful video, it explains what stress is and how bad it really does affect us. The point I hope you get from this video is please do not stress over stress! ==== media type="youtube" key="vzrjEP5MOT4" width="560" height="315"video 2 Figure 3

__ The Reproductive System __ Basically the reproductive systems is the human system that allows mammals to have offspring. This is a key factor in the survival of species and the passing of hereditary trait from one generation to the next, if you'd like to know more about generations and hereditary traits in the human species feel free to check out my other wikipost labeled evolution. For males they have reproductive organs called testes, accessory ducts, accessory glands, and the penis (see figure 4). In females they have reproductive organs known as ovaries, uterus, uterine tubes, cervix's, vulva and vagina (see figure 5). Eggs are made in the ovaries of the female and the sperm is made in the testes of the male. The ovaries and the testes also each make there own hormones called sex hormones. Females have menstrual cycles around every 28 days and what a menstrual cycle really is, is when an egg is unfertilized, hormone levels drop and the womb lining than sheds away; this is a period or menstrual cycle. For the male they don't have anything like a menstrual cycle but they do have androgens and these are the hormones that make males, males. Offspring are created when a sperm meets the egg and becomes fertilized. This is the main reason for the reproduction system and is crucial to human life. We have just scratched the surface here but if you'd like to learn more about the reproduction system, check out this website []

Figure 4 Figure 5

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