The Human Body: One of the Most Complex Productions in the World

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The human body is, in its simplest observation, an extensively vast web of cells. The human body is one of the most complex productions in the world. Looking at just one part of the body such as the eye makes it apparent the complexity of the body’s makeup. The body is comprised of cells that come together to make tissues. These tissues fit together to make organs. The organs coexist to form organ systems. These organ system make up the entire organism that is man.
The Nervous System is the pivotal system of the human body. Everything that goes on in the body is regulated by the nerves of the Nervous System. The nervous system has a few basic building blocks that make it in its entirety. Nerve cells are comprised of a few parts that are vital in their acceptance and sending of stimuli. Close to the body of the cells are small branch like projection called dendrites. Dendrites are the receptors on the cells that take in stimuli sent from the previous cell. Next is the nucleus of the cell situated in the center of the cell body. From the dendrites, the stimuli travel along a long tail like projections of cell called the axon. At the end of the axon there are small branches with bulbs on the end called axon terminal in which the stimuli are sent into a space between cells called the synapse in which the dendrites of another cell picks up and the cycle begins again.
There are two main basic cells: afferent neurons and efferent neurons. Afferent neurons act as the cells that gather the information or stimuli from sensory receptors and take it back to the spinal cord. Efferent neurons do just the opposite. The send a response that is triggered by the spinal cord or brain back to the proper muscles or cells to generate a response. Ef...

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...and Calcitonin. Thyroxine is the hormone that regulates metabolic. The effect of this hormone is an increase in metabolic rate. During this cellular respiration increases.

Works Cited

No author. (2013) Brain basics: Know your brain. Retrieved on March 19, 2014 from http://www.ninds.nih.gov/disorders/brain_basics/know_your_brain.htm
The Franklin Institute. (2014). Blood. Retrieved on March 19, 2014, from http://www.fi.edu/learn/heart/blood/blood.html
No author. (1998). Endocrine system. Retrieved on March 19, 2014, from http://www.ama-assn.org//ama/pub/physician-resources/patient-education-materials/atlas-of-human-body/endocrine-system.page
Taylor, T. (2013). Lungs. Retrieved on March 19, 2014, from http://www.innerbody.com/anatomy/respiratory/lungs
No author. (2014). Your muscles. Retrieved on March 19, 2014, from http://kidshealth.org/kid/htbw/muscles.html

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