 | John Woodside Ritchie, Joseph Stuart Caldwell - 1910 - 200 páginas
...the air waves are large, the sound will be loud. If the air waves are small, the sound will be famt in your ears. The function of the ear. The ear collects...down into the head. At the bottom of this canal is a little skin-like membrane called the tympanic membrane. This separates the outer and the middle ear.... | |
 | Columbus Norman Millard - 1910 - 264 páginas
...protection, we need first to learn some facts about the structure and working of these important organs. Structure of the Ear. — The ear has three divisions,...outer, the middle, and the inner ear. The outer ear is the little flap of cartilage and skin called the auricle, which we can see and feel, and the small... | |
 | Louisa Christiana Lippitt - 1918 - 294 páginas
...and it needs much more careful attention than it usually receives. It is divided into three parts, the outer , the middle, and the inner ear. The outer ear is composed of the auricle, or what we commonly call the ear, and a tube or canal leading into the middle... | |
 | John Woodside Ritchie, Joseph Stuart Caldwell - 1919 - 170 páginas
...possible. THE EARS AND THEIR CARE WHEN you throw a stone into water, the stone causes waves to run out into the water. When you ring a bell, the bell causes waves...membrane. This separates the outer and the middle ear. 133 The middle ear is a little cavity in the bone of the skull. It is filled with air, and from it... | |
 | 240 páginas
...Surplus tears pass down a tube into the nose. The ears Hearing. Each EAR consists of three parts : the OUTER, the MIDDLE, and the INNER ear. The OUTER EAR is the part which projects from the head and helps to 'catch' the sound. Have you noticed a cat or a dog... | |
 | 270 páginas
...already been described in the chapter on LIGHT (see P- 74). HEARING. The EAR consists of three parts: the OUTER, the MIDDLE, and the INNER ear. The OUTER EAR is the part which projects from the head and helps to 'catch' the sound. Have you noticed a Cat or a Dog... | |
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If the air waves are small, the sound will be famt in your ears. The function of the ear. The ear collects the sound waves and makes them strike on the ends of the nerves of hearing. This causes the nerves of hearing to carry messages to the brain, and... 