Rod+Cells+-+SC

=Introduction= toc When I wake up in the morning first thing I do is pick out my clothes. Just imagine getting clothes and getting dressed with the light off cause your brother is sleeping. Not being able to see the color of them and just leaving the house wearing clothes that don't even match. The cell that makes you see is called the rod cell without the rod cell you wouldn't be able to see even a little glimpse of something in the dark. J ust imagine at night you're hungry and you don't want to wake anybody up. So you walk in the dark and you just can't see anything. But since you have your rod cell you can at least make out the shapes of the things around you and be able to make it to the kitchen without one light on. Or even if your walking home late at night and there is not a lot of the street light

=Job of the rod cell= The job of a rod cell is to find light in the dark. They are sensitive to low light that's why your eye work better in dim light. They are responsible for detecting light and sending signals to the brain. Rod cells are also sensitive to light and dark movements. Rod cells are found at the back of the eye near the retina. There are more of them at the edges at the retina and they also allow peripheral vision. Peripheral vision is the side of your eye that you can see out of. There's about 125 million of rods in just one human eye.



=Structure of a rod cell= Some of the parts of a rod cell are Rhodopsin. RHodopsin is a pigment that is sensitive to light and absorbs it. The rhodopsin breaks away into two proteins when light shines on it and sends a message that the brain detects. Brightness makes rhodopsin break down faster than it is reformed. That's why we see in black/white when it’s dark.

media type="youtube" key="EqXld_e9YDM" width="420" height="315"

This video shows the rod cell and the special parts inside of it.

=Diseases affect rod cell=

Retinitis pigmentosa (RP) is rare disease where your retina is sensitive to light. This disease is inherited from your family members. The effect of the disease is that your eye slowly breaks down your rod cells until blindness. When rp is suspected doctors conduct a test called the ‘’visual field test’’ and it is likely to be tested on your on your eyes every year during your yearly eye exams.

=**Conclusion**=

Rod cells are an important because rod cells help you see in the dark. For example lets say it a little dark outside and you are playing catch with your friends. You throw the ball too far and you lose it. If it weren't for the rod cell you wouldn't even be able to see it and i think seeing is the most important things in our lives Imagine just not being able to use your phone and that's an very important part of my life and for most kids my age it is too.

=References=

Works Cited Human eye:rod cell. youtube. youtube, n.d. Web. 17 Mar. 2016. . Padilla, Michael J., Ioannis Miaoulis, and Martha Cyr. Prentice Hall Science Explorer. Boston: Pearson Prentice Hall, 2007. Print. “What is retinitis pigmentosa.” American academy of Ophthalmology. American academy of Ophthalmology, 2016. Web. 17 Mar. 2016. .