As sound waves travel into the ear, they pass from the auditory canal to the:

This nerve of the brachial plexus supplies all the extensor muscles of the upper limb.

The optic disc is known as the blind spot because:

The photoreceptors in the retina that detect light are ________.

Which of the following receptor detects pain sensations?

This muscle is used in smiling.

What part of the eye controls the amount of light entering through the pupil?

The ________ carry tears into the nasal cavity.

What gelatinous mass helps maintain the shape of the eyeball?

The Missouri Compromise