AHS 100 Chapter Notes - Chapter 6: Lacrimal Gland, Ciliary Muscle, Keratin
AHS Chapter 6: The Sensory System- Ophthalmology and Otolaryngologyî‹–î‹–
î‹–
I. The function of the sensory system is collecting specific detailsî‹–
about the surrounding and sending the information on to theî‹–
central nervous systemî‹–î‹–
II. Sensory organs and cells are found throughout our entire body. Ourî‹–
skin contains millions of cells sending info to our brain, includingî‹–
info about pain, pressure, and temperature. Our most complexî‹–
sensory organs are our eyes and ears, they provide us with tons ofî‹–
info about the world around us.î‹–î‹–
6.1 Word Parts of the Sensory Systemî‹–î‹–
I. The eye is a very valuable orhan. The eye rests in a socket made ofî‹–
seven connecting bones in the skull, the socket is also known as theî‹–
orbit. Just outside the eye is a set of eyelids that protect the eyesî‹–
from dust and other floating particles in the eye. Also the eyelidsî‹–
keep the eye moist. The lacrimal gland lies above the eye andî‹–
produces tears that stream across the eye and keep it wet, also theî‹–
eyelids are lined with a thin invisible membrane known as theî‹–
conjunctiva.î‹–î‹–
A. ocul/o, opthalm/o, opt/o- eyeî‹–î‹–
B. lacrim/o, dacry/o- tearî‹–
C. Opia, opsia- vision conditionî‹–î‹–
D. blephar/o- eyelidî‹–î‹–
II. Sclera and corneaî‹–î‹–
A. Outermost layer: sclera and cornea. Sclera: the white part ofî‹–
the eye, a dense, protective later. Cornea: clear surface in theî‹–
middle of the eye, which protects the lens and begins the workî‹–
of focusing light to the back of the eye.î‹–î‹–
B. corne/o, kerat/o- corneaî‹–
C. conjunctiv/o- conjunctivaî‹–
D. scler/o- sclera(the white of the eye)î‹–î‹–
III. Choroid and retinaî‹–î‹–
A. The choroid includes the lens, which gathers light and focusesî‹–
on images. Also includes the iris and ciliary muscles.î‹–î‹–
1. Iris: gives eye the color and controls how much light hitsî‹–
the back of the eyeî‹–î‹–
2. The ciliary muscles: adjust the shape of the eye and lensî‹–
to focus on the eye and lens to focus on near or farî‹–
objects.î‹–î‹–
