ANP 1106 Chapter Notes - Chapter 15: Zonule Of Zinn, Macula Of Retina, Medial Rectus Muscle

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Eyebrows: short coarse hairs that overlie the supraorbital margins; function to shade the eye from sunlight and preventing perspiration from reaching the eye. Orbicularis muscle depresses the eyebrows; corrugator muscles move the eyebrows medially. Palperbrae (eyelids): thin skin-covered folds supported internally by ct sheets called tarsal plates; functions to protect the eye anteriorly. Palpebral fissure separates eyelids and meet at medial and lateral angles of the eye. Levator palpebrae superioris gives the upper eyelid mobility, anchored by tarsal plates. Conjunctiva: transparent mucous membrane that lines the eyelids as the palpebral conjunctiva and covers eyeball as ocular conjunctiva (covers only white, not the cornea); functions to produce lubricating mucus that prevents the eye from drying out. Conjunctivitis is an inflammation of the conjunctiva resulting with red and irritated eyes; pink eye is a conjunctival infection caused by bacteria/viruses. Lacrimal apparatus: consists of lacrimal gland (secrete tears) and ducts that drain lacrimal secretions into nasal cavity.

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