Which structure is the mucous membrane that lines the eyelids and outer surface of the eyeball?

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Multiple Choice

Which structure is the mucous membrane that lines the eyelids and outer surface of the eyeball?

The conjunctiva is a thin mucous membrane that lines the inside of the eyelids (palpebral conjunctiva) and folds over to cover the white part of the eyeball (bulbar conjunctiva). It keeps the eye moist with mucus and provides a first line of defense against irritants and infection. The orbit is the bony eye socket, the sclera is the white, tough outer layer around the eyeball, and the cornea is the clear front window that refracts light. Therefore, the structure described is the conjunctiva.

The conjunctiva is a thin mucous membrane that lines the inside of the eyelids (palpebral conjunctiva) and folds over to cover the white part of the eyeball (bulbar conjunctiva). It keeps the eye moist with mucus and provides a first line of defense against irritants and infection. The orbit is the bony eye socket, the sclera is the white, tough outer layer around the eyeball, and the cornea is the clear front window that refracts light. Therefore, the structure described is the conjunctiva.

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