The degeneration or failure of hearing neural pathways to the brain which can occur with aging is called presbycusis, while the condition of hearing a ringing or roaring in the ears is called tinnitus.
Presbycusis is the normal hearing loos that occurs with aging. The hearing ability is more affected for high-pitched sounds. Low-pitched sounds either are affected very less or are not affected at all. The areas inside the body that may be affected to cause presbycusis are: Inner ear, middle ear or the nerve pathways to the brain.
Tinnitus is the continuous sound of ringing audible to the ears. It can be caused as a result of some other disease or due to other reasons like exposure to loud sounds, whiplash, head injuries, excessive ear wax, or medication side effects.
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Answer:
Bacteria may spread directly from one person to another. For example, they can spread through touching, coughing, or sneezing. They may also spread via food, water, or objects. Another way bacteria and other pathogens can spread by vectors.
(touching, coughing, or sneezing)
Explanation:
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The pharynx is from the upper part of the throat, which is immediately behind the nasal cavity. It is behind the mouth, and above the esophagus and larynx, which are the tubes going down to the stomach and lungs.
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Symbiotic relationship but it's also called mutualism
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