respond to physical stimuli such as sound or touch

respond to temperature

detect tissue damage, extreme heat and cold and chemicals released from damaged cells

respond to light

detect chemicals

detect position of body parts

the white coating of the eye, white tough fibrous connective tissue protecting the inner structures of the eye.

a sheet of photoreceptors that forms the innermost layer of the eye.

a well-defined round or oval area within the retina. The ganglion nerve fibers (axons) exit the retina through this area

fluid found between the cornea and the lens that helps bend light rays and focus them on the retina.

a circular lymphatic-like vessel in the eye that collects aqueous humor from the anterior chamber and delivers it into the episcleral blood vessels via aqueous veins.

3 smallest bones of the body

first bony ossicle where the eardrum is attached

attached to the malleus and stapes

attached to the oval window

are small peg like projections on the dorsal tongue surface that houses the taste buds.

contain the chemoreceptors that detect the flavor of food

are the specific epithelial receptor cells in the taste buds that respond to chemicals dissolved in the saliva.

long microvilli protrusions of gustatory cells that transmit taste impulses to the brain.

are responsible for the detection of odorants