Starting with the head,the upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple animals may not have a head, but many bilaterally symmetric forms do, regardless of size.
Heads develop in animals by an evolutionary trend known as cephalization. In bilaterally symmetrical animals, nervous tissue concentrate at the anterior region, forming structures responsible for information processing. Through biological evolution, sense organs and feeding structures also concentrate into the anterior region; these collectively form the head.we move further to a question what are the components of a head? This means what are inside the head and these are the.ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple animals may not have a head, but many bilaterally symmetric forms do, regardless of their size.first let pick the Ear,noun
the organ of hearing and balance in humans and other vertebrates. it is also an organ sensitive to sound in other animals,an also the ability to recognize, appreciate, and reproduce sounds, especially music or language.The ear is divided into outer (pinna and tympanic membrane), middle (the three ossicles: malleus, incus, and stapes), and inner (cochlea and basilar membrane) divisions. Sound waves travel along the auditory canal and strike the tympanic membrane, causing it to vibrate,vibrations into action potentials, or neural spikes, which are transmitted along the auditory nerve to higher centers of the auditory pathways.The activation of hair cells is a mechanical process: the stimulation of the hair cell ultimately leads to activation of the cell. As hair cells become activated, they generate neural impulses that travel along the auditory nerve to the brain. Auditory information is shuttled to the inferior colliculus, the medial geniculate nucleus of the thalamus, and finally to the auditory cortex in the temporal lobe of the brain for processing. Like the visual system, there is also evidence suggesting that information about auditory recognition and localization is processed in parallel streams now we move further to the part of ear they are:External or outer ear, consisting of:
Pinna or auricle. This is the outside part of the ear.
External auditory canal or tube. This is the tube that connects the outer ear to the inside or middle ear.
Tympanic membrane (eardrum). The tympanic membrane divides the external ear from the middle ear.
Middle ear(tympanic cavity), consisting of:
Ossicles. Three small bones that are connected and transmit the sound waves to the inner ear. The bones are called:
Malleus
Incus
Stapes
Eustachian tube. A canal that links the middle ear with the back of the nose. The eustachian tube helps to equalize the pressure in the middle ear. Equalized pressure is needed for the proper transfer of sound waves. The eustachian tube is lined with mucous, just like the inside of the nose and throat.
Inner ear, consisting of:
Cochlea.This contains the nerves for hearing.
Vestibule.This contains receptors for balance.
Semicircular canals.This contains receptors for balance.the Brain :Every behavior, thought, or experience described in the other modules must be implemented in the brain. A detailed understanding of the human brain can help us make sense of human experience and behavior.let's continue with the fore head.the part of the face above the eyes. 2. : the front or forepart of something. The Forehead can be broadly categorized as follows A wide forehead expresses your cleverness and practicality being someone capable of executing duty diligently. This gives you high idealism and a wealth of ideas.TYPES OF FOREHEAD
Oriental face readers refer to the forehead as the Heavenly area of your face. It could have something to do with the fact that your forehead relates to your brain and therefore all of your higher and more evolved mental and spiritual processes are included in this part of your features. Such things as your reasoning and decision making can be seen from your forehead.
Your dreams and aspirations and how your imagination functions are also clearly observable from the type and quality of forehead that you possess. The more finely shaped your forehead, the more refined your intellectual capacity – so say the Chinese. It will, in fact, be noticed in practice that this very true.The higher fore head
Because your hairline is higher than most you could expect a far better career path and success in your profession generally speaking. Due to your high hairline, your forehead will be quite visible and probably more pronounced than a lot of your other features. This shows your incredible imagination and strong intelligence. Having a high hairline also means that you exhibit a lot of loyalty in your friendships and value what others think of you. You'll, therefore, have a strong sense of integrity in the way you conduct your business affairs. As this part of your face relates to your earlier childhood, depending on how clear and pleasing to the eye this feature is, you will have been well supported as a child and into your teens and will have good memories of your interactions with your family during the earlier part of your life. This, of course, is a great foundation for your future relationships and your own family affairs.Narrow fore head:A narrow forehead – one where your hairline sits low, is considered an obstacle to the fulfillment of your ambitions. And the more blemished, scarred or discoloured the greater the difficulties. As the forehead rules the period of 15 to 34 years of life, the quality and complexion of your forehead reflect most importantly the above period of life. So the quality of each feature is not only a gauge of the "what" but also the "when" of your life. Your narrow forehead reveals your discomfort with social situations. This may be as a result of your troublesome childhood and family dynamics. You will need to carefully think your plan through and also maintain independence in all of your decisions. At times your family members may show an utter disregard for your wishes and can obstruct you in your desire to express and fulfill your ambitions. You need to learn how to articulate your feelings much more. In this way, you can determine the link between early patterns of emotional and mental development and your current inter-relational trends. You'll notice a greater clarity in high foreheads as a result of good family upbringing – as compared to your own narrow forehead shape which seems to result in repeated dilemmas throughout your life. Intelligence, thinking, and idealism, as well as moral and ethical foundations, are seen from your forehead.the third is Dommed fore head:A distinctly dome-shaped forehead as in your case indicates your absolute love of excitement. You love the thrill of life and are ever ready to take up the offer of exhilaration, either in a social context or are simply exploring what life has to offer generally. You'll spice up your aspirations with adventure, travel and cultural interchange which makes you eclectic in your tastes. Please note however that if your dome-shaped forehead exceeds the profile line of the nose (as in a baby's forehead), your character may take on more a dreamy than practical hands-on character which means you must work hard to make your dreams and ambitions a reality. If you possess an exaggerated dome-shaped forehead you are likely to dream your life away and never quite get your projects off the ground. Effective planning and tackling life in smaller, more steady steps will help you in achieving realistic goals.