Human Body

This time I would like to share something interesting with all of you. It is about our body. Yes, human body. How much do we know about our own body? What are the main parts in our body? How our bodies function? It will be expose right here. But of course it is not very detail. I will only share enough for you guys to get an Idea.
First, let us start with the introduction which is the body system. Body system are made from tiny little thing called cells. One cell is only 0.011 inches across. There are about 10 trillion cells in the body. There are different kinds of cells such as nerve cells and muscle cell. From these cells formed a tissue, which is called the muscle and nerve tissue. Two or more of these tissues will create an organ like the brain, stomach, or kidney. They will work together as a complete body system. The body system consist of integument, muscular, skeletal, nervous, sensory, respiratory, cardiovascular, digestive, urinary, reproductive, hormonal, lymphatic, and immune system.

Let us proceed to the largest organ that human has. Can you guess what is it? It is the skin.
It is the largest because an average adult skin can cover a single size bed. In the surface as we can see the skin is actually dead. It is underneath the skin that is alive. The skin replaces itself every month. From the skin we get the sense of touch. This is because there are touch sensor underneath it.

After the skin, there is our hair and nails. Hair and nails also the same as the skin. The outer layer is dead but underneath is alive. Hairs grow almost all part of our skin except palms, the palm sides of your fingers, and the soles of your feet.

Movement that we made every single minute is mostly done by the muscles. Without the muscle we cannot move freely. Half of our body weight is contributed by our muscles.

The muscles cover the main structure of human body which is the skeleton. Do you know that in us there are 206 pieces of bones forming the skeleton? That is a lot right. These bones are join by the muscles.

Our movement is control by the nervous system. What is the nervous system? The nervous system consists of the brain, spinal cord, and the nerves.The system works by sending tiny electrical signals, called nerve impulses. This what determine the response such as pain to the brain to be processed and respond.

The super computer in human body is the brain. It contains 100 billion nerve cells called neurons.If this part of human body is dead. The human itself is as good as dead.

Next part in human which is important is the eyes without them the world is black. The eyes is the mechanism that will capture the image we see and will be sent to the brain to analyse the image. the eyes really not see what we see. Its the capturing tool. The function of the eyes is the same as the camera lens that will only capture rays of light. the image will be build by the brain.

To obtain balance human need the ears. With the ears we can not just hear but it will give us the sense of balance. This is because in the ears there are hair cells that produce nerve signal to inform the body about the gravity and give us balancing response.

Well that is as far as i could share with you because there are longer list than that. I will tell you the list but to get to know it further you guys need to read the book yourself. Here are the list that are not included in my discussion:

- Nose and tongue
- Teeth and Jaw
- Lungs and breathing
- Heart
- Circulatory system
- Blood
- Digestion
- Liver and pancreas
- Kidneys
- Genes
- Reproduction
- Stages of life
- Hormones
- Lymph and immune system

You can continue to obtain the knowledge on human body by reading this book "Just The Fact:Human Body" it was publish for especially for school studies.

*Note: some of the picture were taken from the book.