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6:7 Eye and Ear word
Eye and Ear Key Terms
| Term | Definition |
|---|---|
| aqueous humor | Is a clear, watery fluid that fills the space between the cornea and iris, It helps maintain the forward curvature of the eyeball and refracts (bends to light rays) |
| conjunctiva | mucous membrane that lines the eyelids and covers the front of the eye for protection and lubrication |
| IRIS | color portion of the eye. Located behind the cornea |
| LACRIMAL GLANDS | They produce tears, which moisten cleanse the eye. |
| PUPIL | the opening in the center of the iris |
| REFRACTS | Meaning (bends) |
| RETINA | The innermost layer of the eye. It is made of many layers of nerve cells, which transmit the light impulses to the optic nerve |
| SCLERA | The outermost layer of the eye, tough connective tissue. The white part of the eye |
| VITREOUS HUMOR | jellylike substance that fills the area behind the lens. It helps maintain the shape of the eyeball. It refracts (bends) to light rays. |
| CORNEA | CIRCULAR, TRANSPARENT PART OF THE FRONT OF THE EYE. It allows light rays to enter the eye |
| CONES | nerve cells that is sensitive to color and used while it is lightness. Located in the retina area |
| RODS | Nerve cells used for vision when it is dark or dim. Rods are in the retina |
| LENS | is the circular structure located behind the pupil. It refracts(bends) to light rays do the rays focus on the retina. |
| pinna or auricle ear | visible part of the ear, elastic cartilage covered by skin |
| auditory canal | visible external canal leading into the ear |
| cermen | ear wax, the was protects the ear |
| tympanic membrane | separates the outer ear from the middle ear. It vibrates the sound waves to middle ear. |
| Ossicles | 3 bones malleus, the incus, and the stapes. The transmit sound from tympanic membrane to inner ear |
| Eustachian tube | connects the middle ear to pharynx. helps equalizes the air pressure |
| vestibule | first part of the inner ear, that is an entrance into the cochlar |
| cochlea | shaped like a snail's shell, it has the organ of corti, receptor of sound waves |
| Semicircular canals | located in the inner ear, delicate hair-like cells that bend when liquids moves with head and body movements |
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healthjuniors
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