Science 9: Respiratory and Circulatory Systems

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

(a)  

The (a)   is the only visible part of the respiratory system.

Air enters the nose through two openings called the (a)   or nostrils.

The internal part of the nose.

(a)  

The nerve endings responsible for the sense of smell.

(a)  

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

(a)  

The pharynx is connected to the nasal cavity through openings called the (a)   .

The (a)   receives air from the nasal cavity.

The (a)   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.

(a)