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The functions of the head and neck are to conduct the senses, including vision, hearing and smelling; control speech and swallowing; and to maintain a neutral position of the body. The head includes: 1) the cranium 2) the face 3) part of the brain (frontal lobes or forebrain). The neck has: 1) an upper-jaw joint 2) a clavicle 3) a scapula 4) an acromion 5) two bones that form each side of each jaw. There is then one bone that forms part of each side of both jaws that is common to all vertebrates. Write an introduction to an informative and factual blog post titled "Hart's Body Systems". Examine the body system and explain how it is both an organ and a "whole". A blog post needs to be informative and factual (non-fiction). Blogs do not need to be about current or future events, although that is a popular topic. It can simply explain how something works – like science blogs – or explain how things work in various fields of endeavor – like careers. A blog can also write about what you are currently doing as a hobby or as a student. The point is it needs to be informative and educational. No one wants to read something that reads like fiction, especially if it contains personal opinions or reflections on the author's life without demonstrating any knowledge of the subject. It's always better to factually explain things in a logical and well-thought out manner. ANATOMY OF EARS: They contain an external, middle and inner ear and each ear is divided into three sections: The pinna, also known as auricle; the external acoustic meatus; and the tympanic cavity (tympanum). The pinna serves to collect sound waves and funnel them towards the ear canal. The rod-shaped outer part of the middle ear (the malleus) joins with the eardrum to transmit sound vibrations from the outer ear into the innermost part of the middle ear, known as the tympanic or round window. This area contains an extension of fluid called perilymph (composed of water and dissolved salts). The inner ear is composed of the cochlea, which contains the auditory hair cells that act as receptors for sound, and the vestibular system, which senses changes in position. This system consists of three semicircular canals that detect head movement and a fluid-filled chamber called the saccule, which assists in balance. The eardrum is connected to the bones surrounding the middle ear through tiny muscles, making it possible to adjust how tightly it vibrates when sound pulses arrive. This process allows us to hear sounds at different volumes. The eardrum is divided into three regions. The anterior region contains the stapes, which is a small bone placed in front of the tympanic membrane. It transmits sound vibrations from the middle ear to the ossicles, which are three small bones that transmit sound impulses to the inner ear. The middle region of the eardrum contains a fluid-filled space called the acoustic ampulla, which is an air filled space surrounded by membranes, which transmit vibrations from this area to the oval window of the inner ear. The vestibular system includes three semicircular canals that are located on either side of the brain stem and are shaped like horseshoes. cfa1e77820
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