Special senses anatomy and physiology pdf

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special senses anatomy and physiology pdf

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If your institution subscribes to this resource, and you don't have a MyAccess Profile, please contact your library's reference desk for information on how to gain access to this resource from off-campus. Please consult the latest official manual style if you have any questions regarding the format accuracy. Information about the external world is conveyed to the central nervous system CNS from sensory receptors. Chemoreceptive cells for the senses of taste and smell were discussed with the digestive and respiratory system see Chapters 15 and 17 , respectively and the various mechanoreceptors that mediate the sense of touch were presented with the skin see Chapter

Special senses

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The accessory structures of the eye include the extrinsic eye muscles, eyelids, conjunctiva, and lacrimal apparatus. The eye itself, commonly called the eyeball, is a hollow sphere; its wall is composed of three layers, and its interior is filled with fluids called humor s that help to maintain its shape. Light entering the eye is focused on the retina by the lens, a flexible biconvex, crystal-like structure. Anatomically, the ear is divided into three major areas: the external, or outer, ear; the middle ear, and the internal, or inner, ear. The external, or outer, ear is composed of the auricle and the external acoustic meatus. The middle ear, or tympanic cavity, is a small, air-filled, mucosa-lined cavity within the temporal bone. The internal ear is a maze of bony chambers, called the bony , or osseous , labyrinth , located deep within the temporal bone behind the eye socket.

Anatomy & Physiology (Period 4) Assignments

The diagram shows an eye of a mammal. In the table below add the names of the structures indicated by the letters. Are these statements about the eye true or false? If false give the correct answer. Rearrange these parts of the ear in the order in which sound waves travel to stimulate the cochlea. Jump to: navigation , search. Insert the correct term in the table below.

In anatomy, special senses are the senses that have organs specifically devoted to them such as vision, gustation, olfaction, audition, and equilibrioception. These senses have specialized organs that detect and process stimuli and send signals to the brain which lead to the perception of that stimulus. These specialized organs include the tongue, the nose, the eyes and the ears. The tongue is a crucial organ in mechanical digestion and taste. Taste buds contain taste receptor cells which are the smallest functional unit in gustation. Taste buds can be found throughout the length of the upper digestive tract. On the surface of the tongue are protrusions called papillae.

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5.1: Lab 5- Special Senses

In medicine and anatomy , the special senses are the senses that have specialized organs devoted to them:. The distinction between special and general senses is used to classify nerve fibers running to and from the central nervous system — information from special senses is carried in special somatic afferents and special visceral afferents. In contrast, the other sense, touch , is a somatic sense which does not have a specialized organ but comes from all over the body, most noticeably the skin but also the internal organs viscera. Touch includes mechanoreception pressure, vibration and proprioception , pain nociception and heat thermoception , and such information is carried in general somatic afferents and general visceral afferents. Visual perception is the ability to interpret the surrounding environment using light in the visible spectrum reflected by the objects in the environment.

Special Senses Anatomy and Physiology

The special senses of hearing, sight, smell and taste all have specialised sensory receptors nerve endings outside the brain. These are found in the ears, eyes, nose and mouth. In the brain the incoming nerve impulses undergo complex processes of integration and coordination that result in perception of sensory information and a variety of responses inside and outside the body.