Direction: Read each statement and choose the best answer. Write the answer on a separat sheet of paper.
1. Which of the following are organs of the respiratory system?
a. nasal cavity, pharynx, larynx, lungs
b. nasal cavity, pharynx, larynx, stomach
c. nasal cavity, trachea, brain, heart, lungs
d. nasal cavity, trachea, veins, intestines, lungs

A. Nasal cavity, pharynx, larynx, lungs

Explanation:

The nasal cavity, is the nose, the pharynx is the lining between nose and mouth, larynx is the passage that goes down to the lungs

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

a