Tashea+Brooks

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In our human body there are 650 skeleton muscles. Our skeletal muscles are attached to our skeleton. The human body is the entire structure of a human organism, and consists of a head, neck, torso, two arms and two legs. By the time the human reaches adulthood, the body consists of close to 100 trillion cells, the basic unit of life. These cells are organized biological to eventually form the whole body. This size is firstly determined by genes and secondly by diet. Body types are influenced by factors such as diet, and exercise. The general shape or figure of a person is defined mainly by skeletal structure, muscles and fat. Skeletal structure grows and changes only up to the point at which a human reaches adulthood and remains the same for rest of his or her life. During puberty of the male and female body occurs for the purposes of reproduction. In adult humans, muscle mass may change due to exercise, and fat distribution may change due to hormone fluctuations. Inherited genes play a large part in the development of body shape. Body shape has effects on body posture and gait, and has a major role in physical attraction. This is because a bodies shape implies an individual's hormone levels during puberty, which implies fertility, and it also indicates current levels of sex hormones. ===== = = = = = = = = = = = = = =

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One thing you can do to make you body healthy and keep it healthy is to, walk 30 minutes of walking a day, five days a week, can significantly improve your overall health. Another thing you can do is do something that's you will enjoy and have fun with and commit to, like doing something with your friends such as running or going to the gym or going to swimming for fun to work the upper and lower muscles and bones of the body .Also Eating three to five meals a day sleeping to seven to eight hours and drinking 6 to 12 glasses of water. And you can eat healthy fruit and ask your doctor or whoever for some suggestions on what else to do, to get your body in shape. Also vitamins are a necessary part of any health diet.  Our food is lacking in many essential vitamins and minerals because of over farming so it's a good idea to replace these missing essentials with a daily multivitamin. Claims that vitamins may be harmful have not been backed by any kind of scientific evidence. =====

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Your Digestive System started working even before you took the first bite of your pizza. And the digestive system will be busy at work on your chewed-up lunch for the next few hours or sometimes days, depending upon what you've eaten. This process, called digestion, allows your body to get the nutrients and energy it needs from the food you eat. So let's find out what's happening to that pizza, orange, and milk. Even before you eat, when you smell a tasty food, see it, or think about it, digestion begins. Saliva or spit, begins to form in your mouth. When you do eat, the saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow. Your tongue helps out, pushing the food around while you chew with your teeth. When you're ready to swallow, the tongue pushes a tiny bit of mushed-up food called a bolus toward the back of your throat and into the opening of your esophagus, the second part of the digestive tract. =====  __**Respiratory System: **__ Your Respiratory System is made up of the organs in your body that help you breathe. The goal of breathing is to deliver oxygen to the body and take away carbon dioxide. The lungs are the main organs of the respiratory system. In the lungs oxygen is taken into the body and carbon dioxide is breathed out. The red blood cells are responsible for picking up the oxygens in the lungs and carrying the oxygen to all the body cells that need it. The red blood cells drop off the oxygen to the body cells, then pick up the carbon dioxide which is a waste of gas. The red blood cells transport the carbon dioxide back to the lungs and we breathe it out when we exhale. Unlike Land animals they get oxygen from the air, the air we breathe has about 100 times more carbon dioxide than the air we breath in. 

__**Circulatory System: **__
The circulatory system is made up of the vessels and the muscles that help and control the flow of the blood around the body. This process is called circulation. The main parts of the system are the heart, arteries, capillaries and veins. As blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta. The aorta is the largest artery in the body. The blood leaving the aorta is full of oxygen. This is important for the cells in the brain and the body to do their work. The oxygen rich blood travels throughout the body in its system of arteries into the smallest arterioles. On its way back to the heart, the blood travels through a system of veins. As it reaches the lungs, the carbon dioxide a waste product is removed from the blood and replace with fresh oxygen that we have inhaled through the lungs. The highway system of the Circulatory System consists off a lot of one way streets. The superhighways of the circulatory system are the veins and arteries. Veins are used to carry blood to the heart. Arteries carry blood away from the heart. Most of the time, blood in the veins is blood where most of the oxygen and nutrients have already been delivered to the cells. This blood is called deoxygenated and is very dark red. Most of the time blood in the arteries is loaded with oxygen and nutrients and the color is very *bright* red. There is one artery that carries deoxygenated blood and there are some veins that carry oxygenated blood. To get to the bottom of this little mystery we need to talk about the Heart and Lungs.

__**Nervous System:**__
The neuron is the functional unit of the nervous system. Humans have about 100 billion neurons in their brain alone! While variable in size and shape, all neurons have three parts. dendrites receive information from another cell and transmit the message to the cell body. The cell body contains the nucleus, mitochondria and other organelles typical of eukaryotic cells. The axon conducts messages away from the cell body. Three types of neurons occur. Sensory neurons typically have a long dendrite and short axon, and carry messages from sensory receptors to the central nervous system. Motor neurons have a long axon and short dendrites and transmit messages from the central nervous system to the muscles or to glands. Interneurons are found only in the central nervous system where they connect neuron to neuron. Structure of a neuron and the direction of nerve message transmission, Some axons are wrapped in a myelin formed from the plasma membranes of specialized glial cells known as Schwann cells. Schwann cells serve as supportive, nutritive, and service facilities for neurons. The gap between Schwann cells is known as the node of Ranvier, and serves as points along the neuron for generating a signal. Signals jumping from node to node travel hundreds of times faster than signals traveling along the surface of the axon. This allows your brain to communicate with your toes in a few thousandths of a second.

__**Skeletal System:**__ Your Skeletal system is all of the bones in the body and the tissues such as tendons, ligaments and cartilage that connect them. Your teeth are also considered part of your skeletal system but they are not counted as bones. Your teeth are made of enamel and dentin. Enamel is the strongest substance in your body. The main job of the skeleton is to provide support for our body. Without your skeleton your body would collapse into a heap. Your skeleton is strong but light. Without bones you'd be just a puddle of skin and guts on the floor. Your skeleton also helps protect your internal organs and fragile body tissues. The brain, eyes, heart, lungs and spinal cord are all protected by your skeleton. Your cranium skull protects your brain and eyes, the ribs protect your heart and lungs and your vertebrae spine, backbones protect your spinal cord. Bones provide the structure for muscles to attach so that our bodies are able to move.Tendons are tough inelastic bands that hold attach muscle to bone. A typical bone has an outer layer of hard or compact bone, which is very strong, dense and tough. Inside this is a layer of spongy bone, which is like honeycomb, lighter and slightly flexible. In the middle of some bones is jelly-like bone marrow, where new cells are constantly being produced for the blood. Calcium is an important mineral that bone cells need to stay strong so keep drinking that low-fat milk. Bones are tough and usually don't break even when we have some pretty bad falls. I'm sure you have broken a big stick at one time. When you first try to break the stick it bends a bit but with enough force the stick finally snaps. It is the same with your bones. Bones will bend a little, but if you fall the wrong way from some playground equipment or maybe your bike or skateboard you can break a bone. Doctors call a broken bone a fracture. There are many different types of fractures. Bones need regular exercise to stay as strong as possible. Walking, jogging, running and other physical activities are important in keeping your bones strong and healthy. Riding your bike, basketball, soccer, gymnastics, baseball, dancing, skateboarding and other activities are all good for your bones. Make sure you wear or use the proper equipment like a helmet, kneepads, shin guards, mats, knee pads, etc... to keep those bones safe.

Strengthen your skeleton by drinking milk and eating other dairy products, like low-fat cheese, frozen yogurt, and ice cream. They all contain calcium, which helps bones harden and become strong.

__**Muscular System:**__

Cardiac
> Cardiac muscles are involuntary and found only in the heart. They are controlled by the lower section of the brain called the medulla oblungata, which controlls involuntary action throughout your body. Think about how horrible it would be to have to consciously tell your heart to beat, with the consequence of forgetting being death. What about when you went to sleep!?! But luckily enough, the medulla oblungata does all that for us. Your heart cells come in long strips, each containing a single nucleus, one of the key factors in determining which of the three classes any particular muscle is. Located at the walls of the heart, its main function is to propel blood into circulation. Contraction of the cardiac tissue is caused by an impuse sent from the medulla oblungata to the SA nerve located at the right atrium link-circulatory. > > == Smooth ==

> > Your smooth muscles, like your cardiovascular muscles, are involuntary. They make up your internal organs, such as your stomach-hyper link, throat-hyper link, small intestine-hyper link, and all the others, except your heart. >

Skeletal
The skeletal muscles are the only voluntary muscles of your body, and make up what we call the muscular system. They are all the muscles that move you bones and show external movement. Unlike either of the other two classes, skeletal muscles contain multiple nuclei because of its large size, being in strips up to a couple of feet long.

>>> >>> = Muscular System = The muscles we have in our body are divided into three classes of muscles: cardiac, smooth, and skeletal. Usually, when we think of muscular system we often only remember the skeletal muscles because they make up what is recognized as the muscular system. The muscular system, composed of over 600 muscles, come in a variety of shapes and forms. Diffrences between each muscle are recognized by location, function, structure, and the way they are contracted. >>> >>> == Muscle-Bone interactions LEVER SYSTEM == A lever is a rigid bar on which a given load is moved with supporting help from a fulcrum. A fulcrum is a fixedpoint on which lever can move in diffrent ways or angles. The whole muscular system interacts in this kind of way with the skeletal system-hyperlink. Given a load the muscles pull the bone up or in any direction againsrt the load. Your joints-hyperlink usualy seem to be the fulcrum on which you move the lever or bone. For example, try lifting a book with your hand and puting your elbow on the table. You can move the book in any direction with the help of the joints in your elbow, and the book is lifted in any direction due to the muscles contractions.

Some Names Of these Are:

Flexors, Extenders, Abductors


www.human-body-facts.com www.innerbody.com

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