Exploring the Structure of the Respiratory System

The video tutorial explains the structure and function of the respiratory system, detailing the roles of the nasal cavity, pharynx, epiglottis, larynx, trachea, bronchi, bronchioles, diaphragm, and alveoli. It highlights how air is filtered, the passage of air and food, sound production, and the process of gas exchange in the alveoli, where the respiratory and cardiovascular systems meet.

What is the primary function of the hairs in the nasal cavity?

• To filter particles from the air

• To warm the air

• To detect smells

• To moisten the air

What role does the pharynx play in the respiratory system?

• It filters the air

• It vibrates to produce sounds

• It produces mucus

• It directs air and food into the correct channels

Which structure prevents food from entering the lungs?

• Larynx

• Epiglottis

• Pharynx

• Trachea

What is the common name for the larynx?

• Windpipe

• Voice box

• Air tube

• Sound organ

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

• To circulate blood

• To digest food

• To transport air to the lungs

• To produce sounds

How many lobes does the right lung typically have?

• Three

• Two

• Four

• One

What is the main function of the alveoli in the respiratory system?

• To warm the air

• To filter harmful substances

• To facilitate gas exchange

• To produce respiratory mucus

What is the primary role of the diaphragm in breathing?

• To change the volume of the thoracic cavity

• To hold the lungs

• To filter the air

• To aid in gas exchange

Which muscles help lift the ribcage during inhalation?

• Pelvic muscles

• Internal intercostals

• External intercostals

• Abdominal muscles

How does the structure of the ribs assist in breathing?

• By moving downwards

• By expanding sideways

• By lifting up and out

• By contracting inwards