The Ear:
The ear is the single most essential part that allows us humans to hear the vibrations of sound. The ear also helps us keep our balance. The ears have three main parts. The outer ear, middle ear and inner ear, they all work together to help you hear sound.
The first part of the ear, the 'Pinna', is the part that we can see and feel. It is the part of the ear that collects the sound waves. The outer ear also consist of the ear canal, which the the small tunnel like hole in our ear that leads to the ear drum. Its job is to send the sound waves to the ear drum. It is also the part that collects the yellow substance we call 'ear wax'.
The second part of the ear does the job of collecting the sound waves and turning them into vibrations for the inner ear. The main part of the ear is the 'ear drum', which is not actually visible but is very important as it turns the sound waves into vibrations for the nerve in your inner ear. The middle part of your ear contain the most delicate bones in your entire body. One of these bones, the 'Stapes" is also the smallest bone in the body, which is approximately 1 tenth of an inch.
The inner ear does the job of sending the vibrations made by the ear drum to the brain to be deciphered. The inner ear consist of the cochlear and the auditory nerves. The vibrations sent from the ear drum is than sent through the cochlear, which is filled by a liquid. When the vibrations pass through the liquid begins to move in wave like motions. The cochlear is also filled with tiny hairs, and when the vibrations of sound moves through them, they send these signals to a nerve which in turn sendsit to the brain.
The Eye: The human eye is an organ which reacts to light for several purposes. As a conscious sense organ, the eye allows vision. Rod and cone cells in the retina allows conscious light perception and vision including color differentiation and the perception of depth.
The human eye can distinguish about 10 million colors. In common with the eyes of other mammals, the human eye's non-image-forming photosensitive ganglioncells in the retina receive the light signals which affect adjustment of the size of the pupil, regulation and suppression of the hormone melanin and entrainment of the body clock. The eye is not properly a sphere, rather it is a fused two-piece unit. The smaller frontal unit, more curved, called the cornea is linked to the larger unit called the sclera. The corneal segment is typically about 8 mm (0.3 in) in radius.
The cornea and sclera are connected by a ring called the limbus. The iris – the color of the eye – and its black center, the pupil, are seen instead of the cornea due to the cornea's transparency. The fundus (area opposite the pupil) shows the characteristic pale optic disk (papilla), where vessels entering the eye pass across and optic nerve fibers depart the globe.
The Ear:
The ear is the single most essential part that allows us humans to hear the vibrations of sound. The ear also helps us keep our balance. The ears have three main parts. The outer ear, middle ear and inner ear, they all work together to help you hear sound.
The first part of the ear, the 'Pinna', is the part that we can see and feel. It is the part of the ear that collects the sound waves. The outer ear also consist of the ear canal, which the the small tunnel like hole in our ear that leads to the ear drum. Its job is to send the sound waves to the ear drum. It is also the part that collects the yellow substance we call 'ear wax'.
The second part of the ear does the job of collecting the sound waves and turning them into vibrations for the inner ear. The main part of the ear is the 'ear drum', which is not actually visible but is very important as it turns the sound waves into vibrations for the nerve in your inner ear. The middle part of your ear contain the most delicate bones in your entire body. One of these bones, the 'Stapes" is also the smallest bone in the body, which is approximately 1 tenth of an inch.
The inner ear does the job of sending the vibrations made by the ear drum to the brain to be deciphered. The inner ear consist of the cochlear and the auditory nerves. The vibrations sent from the ear drum is than sent through the cochlear, which is filled by a liquid. When the vibrations pass through the liquid begins to move in wave like motions. The cochlear is also filled with tiny hairs, and when the vibrations of sound moves through them, they send these signals to a nerve which in turn sendsit to the brain.
The Eye:
The human eye is an organ which reacts to light for several purposes.
As a conscious sense organ, the eye allows vision. Rod and cone cells in the retina allows conscious light perception and vision including color differentiation and the perception of depth.
The human eye can distinguish about 10 million colors. In common with the eyes of other mammals, the human eye's non-image-forming photosensitive ganglioncells in the retina receive the light signals which affect adjustment of the size of the pupil, regulation and suppression of the hormone melanin and entrainment of the body clock. The eye is not properly a sphere, rather it is a fused two-piece unit. The smaller frontal unit, more curved, called the cornea is linked to the larger unit called the sclera. The corneal segment is typically about 8 mm (0.3 in) in radius.
The cornea and sclera are connected by a ring called the limbus. The iris – the color of the eye – and its black center, the pupil, are seen instead of the cornea due to the cornea's transparency. The fundus (area opposite the pupil) shows the characteristic pale optic disk (papilla), where vessels entering the eye pass across and optic nerve fibers depart the globe.