Theses are examples of what type of senses: vision, hearing, equilibrium, taste, and smell.

Theses are examples of what type of senses: pressure, temperature, pain, touch, and position.

This is the process of sensory receptors adjusting to the continuous exposure to unimportant stimulus, so that the sensation is less acute.

This sense is considered to be one of the most important of the special senses.

This is gland produces tears and lubricates the eye and contains an enzyme that protects against infection.

Tears flow into canals near the eye's nasal corner where they are drained into the nose through this duct.

The lacrimal glands, ducts, and canals make up this structure.

This is a thin membrane that lines the inner surface of the eyelids and folds back to cover the visible portion of the white of the eye.

This is the outermost tunic and is fibrous. It often referred to as the white of the eye.

This is the anterior portion of the fibrous tunic and is forward-curving, transparent, and colorless.

This is the middle tunic, that is vascular. Composed of delicate network of connective tissue with many blood vessels. *Thus this tunic supplies blood to the eye.*

This is a dark brown pigment that gives the choroid a dark coloration.

This is the colored ring-like portion of the eye. This gives the eye its color characteristic.

This is the eye's actual receptor layer.

These are light-sensitive cells located in the retina.

This is the process of the bending of light rays as they pass from one substance to another substance of different density.

This is a watery fluid that fills the eyeball anterior to the lens and helps maintain the cornea's convex curve. It is constantly produced and drained from the eye.

This is a clear circular structure made of a firm elastic material. *Controls the shape of the eye*

This is a soft jelly-like substance that fills the entire space posterior to the lens.

This is a process of adjusting lens thickness to allow for vision at near and far distances.

This is composed of two sets of muscle fibers that govern the size of the iris's central opening.

This structure contains no photoreceptors and provides no image on the retina at this area.*Blind Spot*

This is a process during the time that the rods are beginning to function well and is changing.

The fovea is located within this yellowish spot.

This is a light-sensitive pigment in the rods. It is complex molecule synthesized from vitamin A.

This condition is caused be a lack of vitamin A and may cause a person to have difficulty seeing in dim light, due to the rods can not be activated.

This is a physician who specializes in treatment of the eye and examines the retina.

This is a instrument used to examine the retina.

This is the external portion of the ear and directs sound waves into the ear.

These are wax producing glands.

This is wax and may become dried and impact the ear's canal and must be removed if impaction occurs. *It is collected in the outer portion of the ear.*

This is the structure at the end of the external auditory canal, that separates this canal from the middle ear cavity. *May be also called the eardrum*

These are three small bones located in the middle ear cavity, within a flatten space.

This bone of the ear is the first bone and is shaped like a hammer.

This is the second bone of the ear and is shaped like an anvil.

This is the innermost ear bone that resembles a stirrup of a saddle.

This structure connects the middle ear cavity the throat or pharynx. The tube allow pressure to equalize on the two sides of the tympanic membrane.

This is hollow bone located in the outer shell of the inner ear.

This structure consist of two chambers that contain some of the receptors for equilibrium.

These are three projecting tubes located toward the posterior of the inner ear.

This is a coiled like snail shell structure that contains the receptors for hearing.

These are receptors for hearing that sit on the membrane of the cochlear duct.

This is a long strip of hair cells.

This is a branch of the eighth cranial nerve.

This is a sense of taste and involves receptors in the tongue.

These are gustatory sensory organs.

These are raised projections that give the tongue its rough texture and help manipulate food when chewing.

These are the five basic tastes of the tongue.

These receptors respond to simple sugars.

These receptors respond to sodium.

These receptors detect hydrogen ions.

These receptors respond to various organic compounds

This is a pungent or savory taste based on a response to amino acids glutamate and aspartate. Which add to meaty taste of protein. Glutamate is found in MSG.

This is a sense of smell.

These touch receptors are found mostly in the dermis of the skin and around hair follicles.

These are receptors that are not enclosed in capsules but are simply branches of nerve fibers that sense temperature.

This receptors are located in the muscles, tendons, and joints and relay impulses that aid in judging the body position and relative changes in the locations of body parts. They inform the brain of the amount of muscle contraction and tendon tension.

These move the eyeball within the eye socket and are attached to the eyeball's outer surface.