Ventilation — definition?
Movement of air into and out of lungs.
Upper respiratory structures — role?
Condition, filter, and conduct air to lower respiratory tract.
Gas exchange in alveoli — process?
Diffusion of oxygen into blood and CO₂ out.
Respiratory system functions?
Ventilation, gas exchange, protection, olfaction.
Alveoli — role?
Gas exchange surface in lungs.
Hemoglobin — function?
Binds oxygen in blood.
Partial pressure — significance?
Determines gas diffusion direction.
Breathing regulation — control centers?
Medulla and pons in brainstem.
Upper respiratory — structures?
Nasal cavity, pharynx, larynx.
Gas exchange — location?
Across alveolar-capillary membrane.
Answer 10 questions on Introduction to the Respiratory System.
1. What is the primary function of gas exchange in the respiratory system?
2. Which of the following structures connects the middle ear to the nasopharynx?
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