Respiratory System Functions and Structures

The video tutorial explains the respiratory system, highlighting its main function of moving oxygen into the body and removing carbon dioxide. It covers the nasal cavity, mouth, pharynx, larynx, trachea, bronchi, and lungs, detailing their roles in respiration. The nasal cavity filters air, while the mouth serves as an alternative breathing route. The pharynx and larynx facilitate air passage and sound production. The trachea and bronchi transport air to the lungs, where gas exchange occurs in the alveoli.

What is the primary function of the respiratory system?

• To produce sound

• To move oxygen into the body and remove carbon dioxide

• To circulate blood

• To digest food

Which of the following is NOT a part of the respiratory system?

• Nasal cavity

• Bronchi

• Heart

• Larynx

What is the role of cilia in the nasal cavity?

• To warm the air

• To humidify the air

• To filter dust and particles from the air

• To produce mucus

What is the pharynx's role in the body?

• It is part of the circulatory system

• It is part of both the respiratory and digestive systems

• It is only part of the respiratory system

• It is only part of the digestive system

What prevents food and water from entering the windpipe?

• Alveoli

• Vocal cords

• Bronchi

• Epiglottis

What is another name for the trachea?

• Windpipe

• Esophagus

• Bronchiole

• Voice box

What are the bronchioles?

• Thin-walled branches of the bronchi

• Muscles used in producing sound

• Air sacs where gas exchange occurs

• Main airways into the lungs

Where does the majority of gas exchange occur in the respiratory system?

• In the pharynx

• In the larynx

• In the alveoli

• In the nasal cavity

What is the main function of the lungs?

• To produce sound

• To transfer oxygen into the bloodstream and excrete carbon dioxide

• To digest food

• To filter dust from the air

What is the role of the alveoli in the respiratory system?

• To prevent food from entering the lungs

• To warm the air

• To facilitate gas exchange

• To produce mucus