Anatomy (from the Greek ἀνατομία anatomia, from ἀνατέμνειν ana: separate, apart from, and temnein, to cut up, cut open) is a branch of biology and medicine that is the consideration of the structure of living things. It is a general term that includes human anatomy, animal anatomy (zootomy) and plant anatomy (phytotomy). In some of its facets anatomy is closely related to embryology, comparative anatomy and comparative embryology,through common roots in evolution.
Anatomy is subdivided into gross anatomy (or macroscopic anatomy) and microscopic anatomy.Gross anatomy (also called topographical anatomy, regional anatomy, or anthropotomy) is the study of anatomical structures that can be seen by unaided vision with the naked eye.Microscopic anatomy is the study of minute anatomical structures assisted with microscopes, which includes histology (the study of the organization of tissues),and cytology (the study of cells).
The history of anatomy has been characterized, over time, by a continually developing understanding of the functions of organs and structures in the body. Methods have also improved dramatically, advancing from examination of animals through dissection of cadavers (dead human bodies) to technologically complex techniques developed in the 20th century including X-ray, ultrasound, and MRI imaging.
Anatomy should not be confused with anatomical pathology...
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Have you ever noticed your cat stalking something you cannot see or hear? Have you ever noticed your cat turning her attention to something or looking quickly in a certain direction while you sit dumbfounded wondering what she is doing? It's possible that she hears something you do not. Of course, that must mean that when you call your cat and she turns her head as if she doesn't hear you, she is choosing not to hear you. If you are familiar with "cat-titude," then knowing about your cat's hearing can come in handy.
Anatomy of the Cat's Ear
It all begins with the cat's outer ear, or pinna, which sits on top of the cat's head. The outer ear is controlled by about 30 different muscles that enable the cat to independently rotate each ear 180 degrees, and position one ear or both facing any sound the cat detects. The shape of the ear is designed to funnel sound down to the middle ear, where the tympanic membrane and three small bones, called auditory ossicles, transmit vibrations into the inner ear. The middle ear also contains a canal called the Eustachian tube that helps to equalize...
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