Approximately how many breaths does an average person take per day?

• 10,000

• 20,000

• 30,000

• 40,000

What is the main function of the respiratory system?

• Circulating blood

• Gas exchange between environment and blood

• Producing hormones

• Filtering toxins from the blood

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

• Nose

• Pharynx

• Esophagus

• Larynx

The pharynx connects the nasal cavity and mouth to which organ below?

• Trachea

• Larynx

• Bronchi

• Esophagus

Which cartilage is known as the 'Adam's apple'?

• Cricoid cartilage

• Thyroid cartilage

• Arytenoid cartilage

• Epiglottis

What is the function of the mucus-producing cells in the trachea?

• Produce hormones

• Trap inhaled foreign particles

• Help in sound production

• Absorb oxygen

The right lung has how many lobes?

• One

• Two

• Three

• Four

What is the name of the membrane that covers the lungs?

• Peritoneum

• Pericardium

• Pleura

• Meninges

What is the functional unit of the lungs responsible for gas exchange?

• Bronchi

• Alveoli

• Acinus

• Bronchioles

The diaphragm assists breathing by:

• Contracting to increase chest volume during inhalation

• Relaxing to increase chest volume during inhalation

• Contracting to decrease chest volume during inhalation

• Relaxing to decrease chest volume during inhalation