Introduction to the Respiratory System

What is the main function of the respiratory system?

Which of the following structures are part of the respiratory system?

• Heart

• Lungs

• Liver

• Kidneys

Fill in the blank: The respiratory system includes the nose, mouth, Trachea (windpipe), Bronchi & Bronchioles, Lungs, Alveoli, ________.

• Diaphragm

• Heart

• Liver

• Kidneys

Trachea: The Trachea is also referred to as the windpipe. It is a tube that carries air to the _______.

• lungs

• stomach

• heart

• brain

Bronchioles are branches that direct air into the _______.

• Bronchioles

• Alveoli

• Trachea

• Larynx

Alveoli: Small air sacs that are located inside the _______. They are made up of tissue. These tissues are found off of the bronchioles. This is where gas exchange takes place.

• lungs

• heart

• stomach

• liver

Diaphragm: Your Diaphragm contracts allowing more space in the chest for oxygen. It also relaxes which reduces the amount of space in your chest which pushes air out of your _______.

• lungs

• stomach

• heart

• intestines

Lungs: A pair of your main organs located in your chest which are responsible for absorbing oxygen and where carbon dioxide is _______.

• exhaled

• inhaled

• stored

• absorbed

What is the function of the nasal cavity in the respiratory system?

• It helps with air filtration and prevents germs.

• It is an alternative airway for when the nose is blocked.

• It allows the body to produce sound and speech.

• It connects the nose and mouth to the larynx and esophagus.

The oral cavity serves as an alternative airway for when the nose is _______.

• blocked.

• open.

• dry.

• clear.