Three intro human anatomy questions..can't find the answers in the book!?

Question

1) The substance which holds the neural retina against the pigmented layer is the _______.

2) As sound vibrations hit the tympanic membrane, this causes vibration of the stapes, which transmit this vibration to the oval window. Here sound vibration is converted to _______ vibration within the cochlea.

3) In some children the auditory tubes are shorter than normal and more horizontal, resulting in inflammation of the middle ear called _______. This inflammation results in the build-up of fluid within the middle ear cavity, putting pressure on the tympanic membrane.

Thanks in advance! =)

Answer 1

1) Choroid plexus
2) MECHANICAL
3) OTITIS MEDIA

Answer 2

1. Fontanels 2.molded 3. growth 4. sutures 5. thoracic and 6. sacral 7? 8. cervical 9. lumbar