what statements are true about

what statements are true about the Accessory Structures of the Eye?

1. The eyebrows prevent perspiration from entering the eyes and help shade the eyes.

b. The eyelids consist of five tissue layers. They protect the eyes from foreign objects and help lubricate the eyes by spreading tears over their surface.

c. The conjunctiva covers the inner eyelid and the exterior part of the eye. = Exterior should be anterior 

d. Lacrimal glands produce tears, which flow across the surface of the eye. Excess tears enter the lacrimal canaliculi and reach the nasal cavity through the nasolacrimal canal. Tears lubricate and protect the eye.

what statements are true about

what statements are true about the anatomy of the eye?

a. The sclera is the posterior four-fifths of the eyeball. It is a clear connective tissue that maintains the shape of the eyeball and provides a site for muscle attachment. 

b. The cornea is the anterior one-fifth of the eye. It is transparent and deflects light that enters the eye.

c. The iris is smooth muscle regulated by the autonomic nervous system. It controls the amount of light entering the pupil.

d. The eyeball has three chambers: anterior, posterior, and vitreous. The anterior and posterior chambers are filled with aqueous humor, which circulates and leaves by way of the scleral venous sinus.

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