Respiratory System

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

• Filters, warms, and moistens incoming air

• Pumps oxygen to the heart

• Produces sound during speech

• Absorbs carbon dioxide from blood

Which of the following best describes the role of the nasal cavity?

• It produces sound

• It stores oxygen

• It prepares air before entering the lungs

• It expands the lungs

Identify the labeled parts and their main functions.

• Pharynx filters air, Larynx produces mucus

• Pharynx is for food and air, Larynx produces sound

• Pharynx connects lungs to heart, Larynx filters blood

• Pharynx controls breathing, Larynx stores oxygen

Which of the following distinguishes the larynx from the pharynx?

• Larynx connects to the esophagus, pharynx makes sound

• Pharynx handles only food, larynx handles only air

• Larynx contains vocal cords, pharynx is a shared passage

• Pharynx leads to stomach, larynx leads to heart

What structure keeps the trachea open during breathing?

• Alveoli sacs

• Smooth muscle

• Cartilage rings

• Vocal folds

What is the main function of the trachea in the respiratory process?

• Transfers oxygen into blood

• Warms incoming air

• Connects throat to lungs for air flow

• Stores air during sleep

What is the function of the bronchi?

• Absorbs nutrients

• Carries air to each lung

• Produces sound

• Exhales carbon dioxide directly

Which of the following correctly explains the role of bronchi in the lungs?

• They produce red blood cells

• They contain alveoli for gas exchange

• They divide into bronchioles and carry air

• They regulate temperature

How do bronchioles differ from bronchi?

• Bronchioles are larger than bronchi

• Bronchioles contain cartilage rings

• Bronchioles are smaller and lack cartilage

• Bronchioles lead directly to the throat

What happens in the alveoli during gas exchange?

• Oxygen enters the blood, carbon dioxide exits

• Air is stored for later use

• Mucus is produced to trap bacteria

• Sound is created by vibration