What Are Barriers to Entry

question 9

Short Answer

What are barriers to entry?

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Definitions:

Nasolacrimal Canal

A duct that drains tears from the lacrimal sac into the nasal cavity.

Tears

A clear fluid secreted by the lacrimal glands of the eye, serving to lubricate the eye and wash away irritants.

Eyes

Eyes are organs of vision that respond to light and allow for vision by sending signals through the optic nerve to the brain.

Nasal Cavity

The large air space behind the nose, involved in breathing and smelling, lined with a mucous membrane.