functions of the parts of the ears

Question 1

structure and the functions of the pinna

Answer 1

structure: shaped like a funnel and made up of skin and
cartilage

functions: collects and directs sound waves into the ear
canal

Question 2

the structure and the funciton of the auditory canal

Answer 2

structure: a 2.5 cm long, narrow tube lined with hair
functions: directs sound wabes to the eardrum

Question 3

the sturcutre and the functions of the eardrum

Answer 3

structure: a thin, stretched membran at the end of the ear
canal

functions: vibrates when sound waves hit it. also changes
sound energy to kinetic energy

Question 4

the structure and the functions of the ossicles

Answer 4

structure: three small bones that connect the eardrum
and oval window

functions: amiplify vibrations and transfer them from the
eardrum to the oval window

Question 5

the structure and functions of the oval window

Answer 5

structure: a thin, small membrane at the end of the
ossicles

functions: transfers vibrations from the ossicles to the
cochlea

Question 6

the structure and functions of the eustachian tube

Answer 6

structure: a narrow tube that connects the middle ear to
the back of the throat

functions: equalises air pressure on both sides of
eardrum. it is not in the hearing mechanism

Question 7

the stucture and functions of the cochlea

Answer 7

structure: a coiled tube filled with fluid and lined with
hair-like sensory cells

functions: detects vibrations and converts it into nerve
impulses.

              changes kinetic energy to electrical energy

Question 8

the structure and functions of the auditory nerve

Answer 8

structure: nerve fibres that connect the ear to the brain

functions: carries nerve impulses from the cochlea to the
brain to be interpreted

Question 9

the structure and functions of the semicircular canals

Answer 9

structure: the semicircular tubes situated at right angles
to each other

functions: detect the position of the head to help keep
our balance