File:Anatomy, physiology and hygiene (1890) (14784328403).jpg

Identifier: anatomyphysiolog00mayc (find matches)
Title: Anatomy, physiology and hygiene
Year: 1890 (1890s)
Authors: May, Charles Henry, 1861-1943
Subjects: Human anatomy Physiology Hygiene, Popular. (from old catalog)
Publisher: New York, W. Wood and company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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abuse the sense of taste ? THE EYE AND THE SENSE OP SIGHT. 424. Protections to the Eye.—The eye is one of the most delicate organs in the body. It is placed in the largeopening in the skull found just below the forehead, on eachside of the nose, called the orbit. This affords it considera-ble protection. Besides this, it is also protected by the eye-brows, eyelids, and eyelashes. In the orbit the eye rests upona soft cushion of fat. 202 425. The Eyelids.—These serve to protect the eyes bytheir quick movement in closing, thus keeping out dust. Theykeep out the light when too strong, or during sleep. 426. The Eyebrows and Eyelashes.—These keep theperspiration from rolling into the eyes, and keep out dust.They should never be cut, for this will not cause them to growany longer and spoils them by making them thick and stiff. End of choroid coat in front.. Space behind iris Membrane supporting the lens Cornea Aqueous humor Lens Iris Space behind iris . End of choroid coat in front ..
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Fig. 89.—The Human Eye (Cut Across and Enlarged), Showing Its Different Parts and the Interior. 427. Parts of the Eye.—The eye is spherical in shape,measuring about an inch in diameter. Its front portion is per-fectly transparent, and is called the cornea. But behind thecornea, which forms about one-fifth of the circumference of theeyeball, it is opaque and white, and can be separated into threelayers, or coats. The outermost layer is hard and strong, andit preserves the form of the eyeball; it is called the white ofthe eye, or the sclerotic coat. The middle layer is dark-colored,and is called the choroid coat. The inner layer is called the THE SENSES. 203 retina. It is of great importance, because the nerve of the eyesends its branches to it, and it is the portion of the eye withwhich we see (Fig. 89). 428. Looking into the eye, we see in the centre a black spotwhich is called the pupil; it is a round opening in a mem-brane which acts as a partition to this part of the eye. Thism

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