Terms in this set (24)
The 4 traditional senses- smell, taste, sight, and hearing
Special sense receptors
Either large complex sensory organs (eyes and ears) or localized clusters of receptors (taste buds and olfactory epithelium)
anteriorly protects the eye
projects from the border of each eyelid
glands that produce and oily secretion that lubricates the eye
modified sweat glands that lie between the eyes
a delicate membrane that lines the eyelids and covers part of the outer surface of the eyeball
consist of the lacrimal glands and a number of ducts that drain the lacrimal secretions into the nasal cavity
located above the lateral end of each eye. they continually release a dilute salt solution (tears) onto the anterior surface of the eyeball through several small ducts.
tears flush across into the eyeball into the____ ___ medially
tears flush across the eyeball into the lacrimal canals edially, then into the______ _______
tears flush across the eyeball into the lacrimal canals edially, then into the lacrimal sac, and finally into the___________ _____ which empties into the nasal cavity.
extrinsic/ external eye muscles
six of these are attached to the outer surface of each eye. these muscles produce gross eye movements and make it possible for the eye to follow a moving object
a hollow sphere. its wall is composed of three tunics, or coats, and its interior is filled with fluids called humors that help to maintain its shape
the outermost tunic of the eyeball. also called the fibrous tunic. is seen anteriorly as the "White of the eye"
A transparent "window" through which light enters the eye.
the middle coat of the eyeball. a blood-rich nutritive tunic that contains a dark pigment. this pigment prevents light from scattering inside the eye.
Anteriorly the choroid is modified to form two smooth muscle structures, the_____ _____ and the iris
the elastic, doubly convex structure in the eye that focuses the light entering the eye on the retina
The pigmented, involuntary muscle that acts as the diaphragm of the eye.
an opening in the center of the iris through which light enters the eye
light sensitive layer of the eye: contains rods and cone
on of the two types of photosensitive cells in the retina
one of two types of photoreceptor cells in the retina of the eye. provides for color vision