Science 9: Respiratory and Circulatory Systems

This system processes food and converts it from an insoluble form into a soluble form.

The ____ is the only visible part of the respiratory system.

Air enters the nose through two openings called the ______________ or nostrils.

The internal part of the nose.

The nerve endings responsible for the sense of smell.

It is a five-inch muscular passageway for both food and air.

The pharynx is connected to the nasal cavity through openings called the ______________.

The ___________ receives air from the nasal cavity.

The __________ is the common passageway for both food and air. It leads to a digestive tract called the esophagus.

These are clusters of tissue that protect the body from foreign invaders that can also be found in the pharynx.