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What are the five accessory eye structures that contribute to the formation of tears andor aid in lubrication of the eyeball?
Wiki User
∙ 12y ago
1. Lacrimal apparatus: consists of the lacrimal gland, lacrimal canaliculi, lacrimal sac, and nasolacrimal duct, with the lysozyme being antibacterial; the lacrimal caruncle produces a whitish oily secretion. The conunctiva secretes mucus, which aids in lubricating the eyeball. Ciliary glands are modified sweat glands and lie between the eyelash hair follicles to help lubricate the eyeball. Tarsal (meibomian) glands secrete an oily substance (inflammation of this is called a sty).
Lacrimal glands liberate tears that flows onto anterior surface of the eyeball
Tears flush across the eyeball and through the lacrimal puncta, the tiny openings of the lacrimal canaliculi medially, then into the lacrimal sac, and finally into the nasolacrimal duct, which empties into the nasal cavity. The lacrimal secretion also contains lysozyme, an antibacterial enzyme.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agothe structures of the lacrimal apparatus and the extrinsic eye muscles
the Accessories of the eye are: the Cilliary glands which are sweat glands between the eye lashes. the Palpebra and ocular Conjunctivas which are *Membranes that lines the eyelids *Connects to the surface of the eye *Secrete Mucus to lubricate the eye. the Lacrimal Apparatus *Dilute salt solution(tears) *Contains antibodies and lysozyme, it also helps protect and moinstens and lubricates the eyes. it empties into the nasal cavity. probably there are more but I don't know the others for sure. I'm also studying for an anatomy test based on the eye structures and stuff. good luck!
Wiki User
∙ 14y agoThey are eyebrows, eyelids, conjuctiva, lacrimal apparatus, and extrinsic eye muscles.
Eyebrows help shade the eyes from sunlight and prevent perspiration trickling down the forehead from reaching the eyes.
Eyelids are used to protect the eyes. The eyelid muscles cause your eyes to blink every 3 to 7 seconds to protect the eyes when they are threaded by foreign objects; the blinking can lubricate our eyes also!
Conjunctiva is a transparent mucous membrane. It's used prevent the eyes from drying out; it also produces a lubricating mucus.
Lacrimal apparatus has a lacrimal gland, which secrets tears. The tears will drain into the lacrimal sac and then into the nasolacrimal duct, which brings the tear to the nasl cavity. This is why whenever you cry, some water will come out of your nose. The lacrimal fluid cleanses, moistens, and lubricates the eyes surface.
Extrinsic eye muscles control the movement of the eyeballs. They help to maintain the shape of the eyeball and hold it in the orbit. They are the most precicely and rapidly controlled skeletal muscles in the whole body!
Wiki User
∙ 12y agoeyebrows, eyelids/ palbrae, eyelashes, ciliary glands, small sebaceous glands<<< i think :)
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eyebrows, eyelids, lacrimal apparatus, conjunctiva, and extrinsic eye muscles
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