Sentences with phrase «tiny ear bone»
The difficult - to - obtain ancient DNA was extracted from a tiny ear bone — called the petrous — by a team led by Losif Lazaridis and David Reich, two population geneticists at Harvard Medical school.
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An ear infection is most often a bacterial or viral infection that affects the middle ear, the air - filled space behind the eardrum that contains the tiny vibrating bones of the ear.
These vibrations are transferred to the cochlea in the inner ear via three tiny bones.
Hearing works partly through the transmission of vibrations from the ear drum to the cochlea, the sensory organ of hearing, via three tiny bones in the middle ear known as ossicles.
His group showed that the petrous bone, containing the tiny inner ear, harbors 100 times more DNA than other ancient human remains, offering a huge increase in the amount of genetic material available for analysis.
Tiny middle ear bones belonging to two of our australopith forebears reveal that the hominins lacked our sensitivity to speech frequencies
Sound waves travel through the ear canal before reaching the eardrum and the tiny bones of the middle ear.
The tympanic membrane, an air - filled chamber containing three tiny bones (hammer, anvil and stirrup), along with the eustachian tube (an air - filled tube connecting to the junction of the nose and mouth) form the middle ear.
The canine ear has an intricate structure consisting of tissue, nerves, cartilage and tiny bones that work together with the brain to conduct and interpret sound.
The middle ear contains the eardrum (tympanic membrane) and the tiny auditory bones that lie just behind it.
Anything that injures the ear canal, ruptures the ear drum or interferes with the tiny bones inside the ear can contribute to deafness, including infections, tumors, waxy build - up, repeated exposure to gunfire and nerve degeneration associated with old age.
Tiny bones in our ears collect sound vibrations and send those to the brain for processing; plants come from seeds growing in sun, water and soil; we are floating in a huge dark space spinning and circling the sun.