ANP 1106 Lecture Notes - Lecture 17: Levator Palpebrae Superioris Muscle, Lacrimal Punctum, Palpebral Fissure

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Jackie Carnegie

Document Summary

Functions include shading the eye, preventing perspiration from reaching the eye: orbicularis muscle depresses the eyebrows. Tarsal plates of connective tissue support the eyelids internally. Levator palpebrae superioris gives the upper eyelid mobility. Lines the eyelids as the palpebral conjunctiva; (cid:373)erges to joi(cid:374) (cid:272)or(cid:374)ea (cid:894)does(cid:374)"t (cid:272)o(cid:448)er (cid:272)or(cid:374)ea(cid:895) Covers the whites of the eyes as the ocular conjunctiva. The wall is composed of three tunics (layers) fibrous, vascular (blood supply), and sensory. The internal cavity is filled with fluids called humors (aqueous anterior and vitrius posterior: a slightly irregular hollow sphere with anterior and posterior poles, retina, cornea, conjunctiva, sclera, choroid. The lens separates the internal cavity into anterior and posterior segments. Lacrimal apparatus consists of lacrimal gland (secrete tears) and associated ducts. Tears contains mucus, antibodies, and lysozyme enter eye via superolateral excretory ducts, exit the eye medially via lacrimal punctum, drain into nasolacrimal duct.