Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
Special senses |
Smell, taste, sight, hearing, and equilibrium |
|
|
Special sense receptor |
Either large, complex sensory organs (eyes and ears) or localized clusters of receptors (taste buds and olfactory epithelium) |
|
|
General senses of touch |
Temperature, pressure, and pain |
|
|
Eye |
70% of all sensory receptors are in this, each one has over a million nerve fiber in them |
|
|
Protection for the eye |
Most of the eye is enclosed in a bony orbit, a cushion of fat surrounds most of the eye |
|
|
Eye accessory |
Eyelids, eyelashes, conjunctiva, lacrimal apparatus, and extrinsic eye muscles |
|
|
Tarsal glands |
Modified sebaceous glands associated with the eyelid edges, glands that lubricate the eye |
|
|
Ciliary glands |
Located between the eyelashes, modified sweat gland |
|
|
Conjunctiva |
Membrane that lines the eyelids, connects to the surface of the eye, and also secrets mucus to lubricate the eye |
|
|
Lacrimal apparatus (tears) |
Lacrimal gland, lacrimal canals, lacrimal sac, and nasolacrimal duct |
|
|
Lacrimal gland |
Produces lacrimal fluid |
|
|
Lacrimal canals |
Drain lacrimal fluid from the eyes |
|
|
Lacrimal sac |
Provides passage of lacrimal fluid towards nasal cavity |
|
|
Nasolacrimal duct |
Empties lacrimal fluid into the nasal cavity |
|
|
Accessory structure of the eye |
Back (Definition) |
|
|
Function of the lacrimal fluid |
Protects, moistens, and lubricates into the eye |
|
|
Properties of the lacrimal fluidthree |
Dilute salt solution, contains antibodies and lysozyme |
|
|
Extrinsic eye muscle |
Six muscles attached to the outer surface of the eye, produce movement |
|
|
Layers forming the wall of the eyeball |
Fibrous, vascular, and sensory |
|
|
Sclera |
White connective tissue layer, seen anteriorly as the white eye |
|
|
Cornea |
Transparent, central anterior portion, allows for light to pass through, repairs itself easily, the only human tissue that can transplanted without fear of rejection |
|
|
Fibrous layer |
Sclera and cornea |
|
|
Choroid |
A blood-rich nutritive layer in the posterior of the eye, pigment prevents light from scattering |
|
|
Ciliary bodu |
Smooth muscle attached tot he lens |
|
|
Iris |
Regulate amount of light entering the eye, pigmented layer that gives eye color, contains the pupil |
|
|
Pupil |
Rounded opening in the iris |
|
|
Photoreceptors |
Rods and cons |
|
|
Optic disc |
Blind spot is where the optic nerve leaves the eyeball, cannot see images focused on this |
|
|
Rods |
Most are found toward the edges of the retina, allow dim light vision and peripheral vision, all perception is in the gray tones |
|
|
Cones |
Allow for detailed color vision, denser in the center of the retina, fovea centrails |
