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