Lower Respiratory Tract

Lower respiratory tract structure?

• larynx

• trachea

• pharynx

• bronchi

• lungs

Identify the shape of the tracheal rings

• O-shaped rings

• U-shaped rings

• C-shaped rings

Which of the following is a function of the cartilaginous tracheal rings?

• Prevent food from entering trachea

• Support tracheal wall and prevent air passageway from collapsing

• Secrete a layer of mucous

Which of the following is a function of the trachea?

• Cool the air

• Humidifies and moistens the air

• Conducting air between the larynx (in the neck) and the primary bronchi (in the chest)

Which of the following describes the function of the bronchial smooth muscle fibers?

• To produce mucous secretions

• To prevent a food bolus from entering the trachea

• They control bronchial lumen size to enhance airflow, remove foreign particles, and assist in coughing

Identify the structure highlighted in green.

• Tertiary bronchi

• Secondary bronchi

• Primary bronchi

Which lung contain less volume due to an inhalation that is occupied by the heart?

• The left lung

• The right lung

Identify some of the tubes and ducts that make up a large portion of each lung?

• Tubes = bronchi, bronchioles, alveolar ducts

  Blood vessels = arteries, veins, capillaries

• Tubes = collecting duct, distal convoluted tubule

  Blood vessels = vasa recta, glomerulus

• Tube = bile canal

  Blood vessels = hepatic arteriole

Which lung is slightly shorter in length due to the position of the liver?

• The left lung

• The right lung

Select alveoli functions?

• External respiration

• Defense against microbes

• Warming & humidifying