SCIENCE 9: RESPIRATORY SYSTEM

What is the primary function of the respiratory system?

A. Digesting food

• B. Taking in oxygen and expelling carbon dioxide

• C. Circulating blood

• D. Producing hormones

Which of the following is not part of the respiratory system?

• A. Lungs

• B. Heart

• C. Trachea

• D. Nasal passages

The respiratory system is divided into which two main parts?

• Digestive and Excretory

• • Upper Respiratory Tract and Lower Respiratory Tract

• • Circulatory and Nervous

• • Muscular and Skeletal

What is respiration in the context of the respiratory system?

• • The exchange of air between the lungs and the atmosphere

• • The circulation of blood throughout the body

• • The exchange of gases between the cells and their environment

• • The process of food digestion and nutrient absorption

What is ventilation in the context of the respiratory system?

• • The process of moving food through the digestive system

• • The exchange of air between the lungs and the atmosphere so that oxygen can be exchanged for carbon dioxide

• • The circulation of blood in the body

• • The production of hormones in the endocrine system

What is the nose made of?

• • Bone and cartilage

• • Muscle and skin

• • Bone and muscle

• • Cartilage and muscle

What is the function of the hair inside the nostrils?

• • To produce mucus

• • To trap dust and pathogens

• • To warm the air

• • To moisten the air

Where is the nasal cavity located?

• • Within the lungs

• • Within the skull, separated by the nasal septum

• • In the throat

• • In the mouth

What is the function of the nasal mucosa?

• • To produce sound

• • To warm and moisten the incoming air

• • To cool the air

• • To filter blood

What does mucus do in the nasal cavity?

• • It produces sound

• • It traps dust and pathogens

• • It circulates blood

• • It dries the air