.: Sensory Organs:.

Summary:
Vision, touch, hearing the things that our bodies do for us everyday. These incredible mechanisms help us apply our self's to the world. We don't notice them until one is out of whack and it can through our whole day off. The sense of the human body are something to think about because its how we perceive our world. In this chapter, the senses of the human body are going to go more in depth and talk about touch ,hearing, equilibrium, sight,taste, smell and how they are processed in the CNS.
Vision:


DWA_5_eye_brain.jpg

Hearing and balance:


parts_of_the_ear.gif



Taste and smell:


TASTE.gif



Touch:


proprioception.jpg




The nervous system and the senses


How does this apply to my career?
There are many reasons why sense apply to my career as a nurse. One of the many reason why is the understanding of referred pain. For an example if one of my patients is having pain in their left arm it might have something to do with heart and might be a warning sign of a heart attack. Another senses that is important in the health care field is learning how the ear works. As a nurse I might have to come across determining if a resident/ patient needs there hearing checked or get their ears checked out by a physician to remove the wax build up. Also the mechanics of the ears could pay a part in somebodies equilibrium, and noticing signs that something isn't just right might be important. Understanding of all the other sense are important at the work place because it would help me better to take care or the patient. Some examples of this is knowing the elderly taste buds are so strong and cant taste like how they use to or helping the people that are blind or have vision disorders or disease like glaucoma, color blindness and cataracts.


1. Flow chart to describe how sound waves in the air within the external auditory meatus are transduced into movements of the basilar membrane.




2.Describe how light is transmitted through the structures of the eye refracted and photoreceptors are stimulated to send
the CNS to be interpreted.

eye.jpg

First light starts out by entering through the cornea. Then it enters the anterior chamber of the eye. It will soon reach the pupil . The pupil is protected by a pigments muscle called the iris. This regulates the amount of light that is let into the pupil. After the light has reached the pupil it will go through the lens of the eye. The lens is made up of tightly arranged protein fibers. Then the the lens refracts the light and enters the vitreous body. When the light reaches the retina and the light is absorbed by the choroid layer. It is in this process that the light stimulates photoreceptors and activates neurons. The neurons gather in the optic disc of the eye and the message is sent through the optic nerve to the central nervous system for processing.



Fun Fact: An average woman has 17sq feet of skin but in her ninth month of pregnancy she has 18.5 sq ft of skin.


Thanks to:
http://www.colorado.edu/intphys/Class/IPHY3430-200/008sensory.htm
http://biology.clc.uc.edu/courses/bio105/nervous.htm
Youtube.com
http://www.wolfeeyeclinic.com/images/diagram/parts_of_the_ear.gif
http://people.exeter.ac.uk/mwdp201/space.html
Human physiology 11th edition -McGraw-Hill
Anatomy and Physiology 4th edition-Mcgraw-Hill