Structure & Function of the Respiratory System

What is the primary function of the respiratory system?

• To circulate blood throughout the body

• To exchange gases between the body and the environment

• To digest food and absorb nutrients

• To protect the body from infections

Which of the following structures is the main site of gas exchange in the respiratory system?

• Trachea

• Bronchi

• Alveoli

• Larynx

What is the name of the muscle that plays a crucial role in the process of inhalation?

• Intercostal muscle

• Diaphragm

• Abdominal muscle

• Pectoral muscle

Which part of the respiratory system is commonly known as the windpipe?

• Larynx

• Pharynx

• Trachea

• Bronchi

What is the function of the pharynx in the respiratory system?

• To produce mucus

• To filter and trap particles from inhaled air

• To exchange oxygen and carbon dioxide

• To connect nasal cavity and larynx

Which structure connects the trachea to the bronchioles?

• Bronchi

• Alveoli

• Oesophagus

• Bronchioles

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

• To exchange gases

• To warm, moisten, and filter incoming air

• To produce sound

• To store oxygen

What is the role of the diaphragm?

• Facilitate breathing

• Produce voice

• Keep airways open

• Aid in gaseous exchange

What is NOT a function of the larynx?

• to provide an open airway

• to act as a switching mechanism to guide air and food to the correct channels

• to produce mucus

• to produce voice

Which bronchus is shorter?

• Left

• Right