. The horse in health and disease : a text-book pertaining to veterinary science for agricultural students . Horses; Horses. 12S THE HOKJSE IN HEALTH AND DISEASE The eyelids are the most exposed parts. They are movable !'ol(!s of skin on the margins of which the eyelashes are borne. The third eyelid, haw, or nictitating membrane is an important part of the eye of the hors(\ It consists of a plate of cartilage covered liy a fold of the c(_)njunctiva. By frequently closing and opening the eyelids the horse removes dust particles from the cornea and keeps tlie in working ordei'. The conjunct
. The horse in health and disease : a text-book pertaining to veterinary science for agricultural students . Horses; Horses. 12S THE HOKJSE IN HEALTH AND DISEASE The eyelids are the most exposed parts. They are movable !'ol(!s of skin on the margins of which the eyelashes are borne. The third eyelid, haw, or nictitating membrane is an important part of the eye of the hors(\ It consists of a plate of cartilage covered liy a fold of the c(_)njunctiva. By frequently closing and opening the eyelids the horse removes dust particles from the cornea and keeps tlie in working ordei'. The conjunctiva is the mucous uiemln'ane .which hues the eye- hds and is reflected on to tlie anterior part of the eyeball. It is normallj^ of a bright pink color. Srkrn Opiic nert'c— OjiUc iiuinli'!" Rt^tiobidhar JaV Rutus ocidi tnjt on of lovjuncliva \ Granulo iridis. proub^es t2.—\'ortir;Ll section of cypbiill. The contour of the crystalline lens is dotted. (Sisson, Anatomy of Domestic Animals.) Tlie lacrimal apparatus is made up of the lacrimal gland. which secretes the tears; and the Incriinal duct, which carries fh(> overflow of fluid to the nasal cavit}'. Tears assist in re- moving the small particles, of dirt from the eyeball and keep it moistened. The eyeball is composed of tlie s<\ginents of two spheres of different sizi^s (Fig. 42). The anterior is the cornea; the pos- terior, the sclera. The cornea is transi)arent, oval in outline, and fits into the sclera like a crystal does into a watch. The sclera,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hadley, Frederick Brown, 1880-. Philadelphia ; London : W. B. Saunders Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthorses, bookyear1915
