What is the coiled portion of the labyrinth called?

The olfactory epithelium is the extension of which of the following?

Identify the part of the eye.

The iris is a continuation of which of these structures?

Which part of the neuron is present in a high concentration in the grey matter?

What is the point of exit of optic nerves and entry of blood vessels in the eye?

Which of these are involved in the transmission of nerve impulses?

To which of these structures does the external auditory meatus extend up to?